From 7e5804cb7014bf3154542a3d2afc68c3a61b7452 Mon Sep 17 00:00:00 2001
From: Heschi Kreinick <heschi@google.com>
Date: Wed, 16 Mar 2022 18:17:58 -0400
Subject: [PATCH] cmd: update vendored pprof

  go get github.com/google/pprof@latest
  go mod vendor

Plus a tiny change to the pprof command to match an upstream interface
change.

Updates #36905.

Change-Id: I4c7bbe8c317a6eeb217fce971b208f96ab0727fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/393370
Trust: Heschi Kreinick <heschi@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
Auto-Submit: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
---
 src/cmd/go.mod                                |    2 +-
 src/cmd/go.sum                                |    4 +-
 src/cmd/pprof/pprof.go                        |    2 +-
 .../github.com/google/pprof/driver/driver.go  |   10 +-
 .../pprof/internal/binutils/binutils.go       |   38 +-
 .../google/pprof/internal/driver/cli.go       |    2 +-
 .../google/pprof/internal/driver/fetch.go     |    6 +-
 .../google/pprof/internal/driver/webhtml.go   |   21 +-
 .../google/pprof/internal/elfexec/elfexec.go  |    6 +-
 .../google/pprof/internal/graph/dotgraph.go   |    4 +-
 .../google/pprof/internal/plugin/plugin.go    |    6 +-
 .../google/pprof/internal/report/report.go    |    2 +-
 .../google/pprof/internal/report/source.go    |    2 +-
 .../pprof/internal/symbolizer/symbolizer.go   |    5 +-
 .../github.com/google/pprof/profile/encode.go |    9 +
 .../github.com/google/pprof/profile/merge.go  |   21 +-
 .../google/pprof/profile/profile.go           |    9 +
 .../google/pprof/third_party/d3/LICENSE       |   27 -
 .../google/pprof/third_party/d3/README.md     |  119 -
 .../google/pprof/third_party/d3/d3.go         | 4675 -----------------
 .../{LICENSE => D3_FLAME_GRAPH_LICENSE}       |    0
 .../pprof/third_party/d3flamegraph/D3_LICENSE |   13 +
 .../pprof/third_party/d3flamegraph/README.md  |   33 +
 .../d3flamegraph/d3_flame_graph.go            |  976 +---
 .../pprof/third_party/d3flamegraph/index.js   |   13 +
 .../d3flamegraph/package-lock.json            | 1106 ++++
 .../third_party/d3flamegraph/package.json     |   17 +
 .../pprof/third_party/d3flamegraph/update.sh  |   62 +
 .../d3flamegraph/webpack.config.js            |   13 +
 src/cmd/vendor/modules.txt                    |    3 +-
 30 files changed, 1361 insertions(+), 5845 deletions(-)
 delete mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3/LICENSE
 delete mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3/README.md
 delete mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3/d3.go
 rename src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/{LICENSE => D3_FLAME_GRAPH_LICENSE} (100%)
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_LICENSE
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/README.md
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/index.js
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package-lock.json
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package.json
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/update.sh
 create mode 100644 src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/webpack.config.js

diff --git a/src/cmd/go.mod b/src/cmd/go.mod
index ce1a32f386..c99cb8cdb3 100644
--- a/src/cmd/go.mod
+++ b/src/cmd/go.mod
@@ -3,7 +3,7 @@ module cmd
 go 1.19
 
 require (
-	github.com/google/pprof v0.0.0-20211104044539-f987b9c94b31
+	github.com/google/pprof v0.0.0-20220314021825-5bba342933ea
 	golang.org/x/arch v0.0.0-20210923205945-b76863e36670
 	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
diff --git a/src/cmd/go.sum b/src/cmd/go.sum
index b4a800b07e..39d9e109ad 100644
--- a/src/cmd/go.sum
+++ b/src/cmd/go.sum
@@ -1,8 +1,8 @@
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/google/pprof v0.0.0-20211104044539-f987b9c94b31 h1:YvpxjnjGhf/vDEeYOysNbsrtB///PKS8lqkFNSDm1p8=
-github.com/google/pprof v0.0.0-20211104044539-f987b9c94b31/go.mod h1:KgnwoLYCZ8IQu3XUZ8Nc/bM9CCZFOyjUNOSygVozoDg=
+github.com/google/pprof v0.0.0-20220314021825-5bba342933ea h1:yVDp4C9ff/qoEAhHNf5cqk/YTxTGECSzGYzahdhEKBI=
+github.com/google/pprof v0.0.0-20220314021825-5bba342933ea/go.mod h1:KgnwoLYCZ8IQu3XUZ8Nc/bM9CCZFOyjUNOSygVozoDg=
 github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d h1:uGg2frlt3IcT7kbV6LEp5ONv4vmoO2FW4qSO+my/aoM=
 github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d/go.mod h1:aYm2/VgdVmcIU8iMfdMvDMsRAQjcfZSKFby6HOFvi/w=
 golang.org/x/arch v0.0.0-20210923205945-b76863e36670 h1:18EFjUmQOcUvxNYSkA6jO9VAiXCnxFY6NyDX0bHDmkU=
diff --git a/src/cmd/pprof/pprof.go b/src/cmd/pprof/pprof.go
index e72c765adc..c073c964b4 100644
--- a/src/cmd/pprof/pprof.go
+++ b/src/cmd/pprof/pprof.go
@@ -149,7 +149,7 @@ type objTool struct {
 	disasmCache map[string]*objfile.Disasm
 }
 
-func (*objTool) Open(name string, start, limit, offset uint64) (driver.ObjFile, error) {
+func (*objTool) Open(name string, start, limit, offset uint64, relocationSymbol string) (driver.ObjFile, error) {
 	of, err := objfile.Open(name)
 	if err != nil {
 		return nil, err
diff --git a/src/cmd/vendor/github.com/google/pprof/driver/driver.go b/src/cmd/vendor/github.com/google/pprof/driver/driver.go
index fc05f919ba..5a8222f70a 100644
--- a/src/cmd/vendor/github.com/google/pprof/driver/driver.go
+++ b/src/cmd/vendor/github.com/google/pprof/driver/driver.go
@@ -137,8 +137,10 @@ type MappingSources map[string][]struct {
 type ObjTool interface {
 	// Open opens the named object file. If the object is a shared
 	// library, start/limit/offset are the addresses where it is mapped
-	// into memory in the address space being inspected.
-	Open(file string, start, limit, offset uint64) (ObjFile, error)
+	// into memory in the address space being inspected. If the object
+	// is a linux kernel, relocationSymbol is the name of the symbol
+	// corresponding to the start address.
+	Open(file string, start, limit, offset uint64, relocationSymbol string) (ObjFile, error)
 
 	// Disasm disassembles the named object file, starting at
 	// the start address and stopping at (before) the end address.
@@ -232,8 +234,8 @@ type internalObjTool struct {
 	ObjTool
 }
 
-func (o *internalObjTool) Open(file string, start, limit, offset uint64) (plugin.ObjFile, error) {
-	f, err := o.ObjTool.Open(file, start, limit, offset)
+func (o *internalObjTool) Open(file string, start, limit, offset uint64, relocationSymbol string) (plugin.ObjFile, error) {
+	f, err := o.ObjTool.Open(file, start, limit, offset, relocationSymbol)
 	if err != nil {
 		return nil, err
 	}
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
index e920eeb2fa..efa9167af7 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
@@ -284,7 +284,7 @@ func (bu *Binutils) Disasm(file string, start, end uint64, intelSyntax bool) ([]
 }
 
 // Open satisfies the plugin.ObjTool interface.
-func (bu *Binutils) Open(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
+func (bu *Binutils) Open(name string, start, limit, offset uint64, relocationSymbol string) (plugin.ObjFile, error) {
 	b := bu.get()
 
 	// Make sure file is a supported executable.
@@ -316,7 +316,7 @@ func (bu *Binutils) Open(name string, start, limit, offset uint64) (plugin.ObjFi
 
 	// Match against supported file types.
 	if elfMagic == elf.ELFMAG {
-		f, err := b.openELF(name, start, limit, offset)
+		f, err := b.openELF(name, start, limit, offset, relocationSymbol)
 		if err != nil {
 			return nil, fmt.Errorf("error reading ELF file %s: %v", name, err)
 		}
@@ -425,7 +425,7 @@ func (b *binrep) openMachO(name string, start, limit, offset uint64) (plugin.Obj
 	return b.openMachOCommon(name, of, start, limit, offset)
 }
 
-func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
+func (b *binrep) openELF(name string, start, limit, offset uint64, relocationSymbol string) (plugin.ObjFile, error) {
 	ef, err := elfOpen(name)
 	if err != nil {
 		return nil, fmt.Errorf("error parsing %s: %v", name, err)
@@ -440,8 +440,8 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 	}
 
 	var (
-		stextOffset *uint64
-		pageAligned = func(addr uint64) bool { return addr%4096 == 0 }
+		kernelOffset *uint64
+		pageAligned  = func(addr uint64) bool { return addr%4096 == 0 }
 	)
 	if strings.Contains(name, "vmlinux") || !pageAligned(start) || !pageAligned(limit) || !pageAligned(offset) {
 		// Reading all Symbols is expensive, and we only rarely need it so
@@ -455,10 +455,18 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 		if err != nil && err != elf.ErrNoSymbols {
 			return nil, err
 		}
+
+		// The kernel relocation symbol (the mapping start address) can be either
+		// _text or _stext. When profiles are generated by `perf`, which one was used is
+		// distinguished by the mapping name for the kernel image:
+		// '[kernel.kallsyms]_text' or '[kernel.kallsyms]_stext', respectively. If we haven't
+		// been able to parse it from the mapping, we default to _stext.
+		if relocationSymbol == "" {
+			relocationSymbol = "_stext"
+		}
 		for _, s := range symbols {
-			if s.Name == "_stext" {
-				// The kernel may use _stext as the mapping start address.
-				stextOffset = &s.Value
+			if s.Name == relocationSymbol {
+				kernelOffset = &s.Value
 				break
 			}
 		}
@@ -469,7 +477,7 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 	// value until we have a sample address for this mapping, so that we can
 	// correctly identify the associated program segment that is needed to compute
 	// the base.
-	if _, err := elfexec.GetBase(&ef.FileHeader, elfexec.FindTextProgHeader(ef), stextOffset, start, limit, offset); err != nil {
+	if _, err := elfexec.GetBase(&ef.FileHeader, elfexec.FindTextProgHeader(ef), kernelOffset, start, limit, offset); err != nil {
 		return nil, fmt.Errorf("could not identify base for %s: %v", name, err)
 	}
 
@@ -478,14 +486,14 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 			b:       b,
 			name:    name,
 			buildID: buildID,
-			m:       &elfMapping{start: start, limit: limit, offset: offset, stextOffset: stextOffset},
+			m:       &elfMapping{start: start, limit: limit, offset: offset, kernelOffset: kernelOffset},
 		}}, nil
 	}
 	return &fileAddr2Line{file: file{
 		b:       b,
 		name:    name,
 		buildID: buildID,
-		m:       &elfMapping{start: start, limit: limit, offset: offset, stextOffset: stextOffset},
+		m:       &elfMapping{start: start, limit: limit, offset: offset, kernelOffset: kernelOffset},
 	}}, nil
 }
 
@@ -521,8 +529,8 @@ func (b *binrep) openPE(name string, start, limit, offset uint64) (plugin.ObjFil
 type elfMapping struct {
 	// Runtime mapping parameters.
 	start, limit, offset uint64
-	// Offset of _stext symbol. Only defined for kernel images, nil otherwise.
-	stextOffset *uint64
+	// Offset of kernel relocation symbol. Only defined for kernel images, nil otherwise.
+	kernelOffset *uint64
 }
 
 // findProgramHeader returns the program segment that matches the current
@@ -535,7 +543,7 @@ func (m *elfMapping) findProgramHeader(ef *elf.File, addr uint64) (*elf.ProgHead
 	// it's a kernel / .ko module mapping, because with quipper address remapping
 	// enabled, the address would be in the lower half of the address space.
 
-	if m.stextOffset != nil || m.start >= m.limit || m.limit >= (uint64(1)<<63) {
+	if m.kernelOffset != nil || m.start >= m.limit || m.limit >= (uint64(1)<<63) {
 		// For the kernel, find the program segment that includes the .text section.
 		return elfexec.FindTextProgHeader(ef), nil
 	}
@@ -601,7 +609,7 @@ func (f *file) computeBase(addr uint64) error {
 		return fmt.Errorf("failed to find program header for file %q, ELF mapping %#v, address %x: %v", f.name, *f.m, addr, err)
 	}
 
-	base, err := elfexec.GetBase(&ef.FileHeader, ph, f.m.stextOffset, f.m.start, f.m.limit, f.m.offset)
+	base, err := elfexec.GetBase(&ef.FileHeader, ph, f.m.kernelOffset, f.m.start, f.m.limit, f.m.offset)
 	if err != nil {
 		return err
 	}
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/cli.go b/src/cmd/vendor/github.com/google/pprof/internal/driver/cli.go
index 492400c5f3..237cc33233 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/cli.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/cli.go
@@ -98,7 +98,7 @@ func parseFlags(o *plugin.Options) (*source, []string, error) {
 	// Recognize first argument as an executable or buildid override.
 	if len(args) > 1 {
 		arg0 := args[0]
-		if file, err := o.Obj.Open(arg0, 0, ^uint64(0), 0); err == nil {
+		if file, err := o.Obj.Open(arg0, 0, ^uint64(0), 0, ""); err == nil {
 			file.Close()
 			execName = arg0
 			args = args[1:]
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/fetch.go b/src/cmd/vendor/github.com/google/pprof/internal/driver/fetch.go
index b8a69e87fc..0b361651bc 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/fetch.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/fetch.go
@@ -420,12 +420,14 @@ mapping:
 				fileNames = append(fileNames, filepath.Join(path, m.File))
 			}
 			for _, name := range fileNames {
-				if f, err := obj.Open(name, m.Start, m.Limit, m.Offset); err == nil {
+				if f, err := obj.Open(name, m.Start, m.Limit, m.Offset, m.KernelRelocationSymbol); err == nil {
 					defer f.Close()
 					fileBuildID := f.BuildID()
 					if m.BuildID != "" && m.BuildID != fileBuildID {
 						ui.PrintErr("Ignoring local file " + name + ": build-id mismatch (" + m.BuildID + " != " + fileBuildID + ")")
 					} else {
+						// Explicitly do not update KernelRelocationSymbol --
+						// the new local file name is most likely missing it.
 						m.File = name
 						continue mapping
 					}
@@ -449,6 +451,8 @@ mapping:
 	if execName, buildID := s.ExecName, s.BuildID; execName != "" || buildID != "" {
 		m := p.Mapping[0]
 		if execName != "" {
+			// Explicitly do not update KernelRelocationSymbol --
+			// the source override is most likely missing it.
 			m.File = execName
 		}
 		if buildID != "" {
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/webhtml.go b/src/cmd/vendor/github.com/google/pprof/internal/driver/webhtml.go
index b9c73271b8..63df668321 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/webhtml.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/webhtml.go
@@ -17,13 +17,11 @@ package driver
 import (
 	"html/template"
 
-	"github.com/google/pprof/third_party/d3"
 	"github.com/google/pprof/third_party/d3flamegraph"
 )
 
 // addTemplates adds a set of template definitions to templates.
 func addTemplates(templates *template.Template) {
-	template.Must(templates.Parse(`{{define "d3script"}}` + d3.JSSource + `{{end}}`))
 	template.Must(templates.Parse(`{{define "d3flamegraphscript"}}` + d3flamegraph.JSSource + `{{end}}`))
 	template.Must(templates.Parse(`{{define "d3flamegraphcss"}}` + d3flamegraph.CSSSource + `{{end}}`))
 	template.Must(templates.Parse(`
@@ -1329,40 +1327,29 @@ function viewer(baseUrl, nodes) {
   </div>
   {{template "script" .}}
   <script>viewer(new URL(window.location.href), {{.Nodes}});</script>
-  <script>{{template "d3script" .}}</script>
   <script>{{template "d3flamegraphscript" .}}</script>
   <script>
     var data = {{.FlameGraph}};
 
     var width = document.getElementById('chart').clientWidth;
 
-    var flameGraph = d3.flamegraph()
+    var flameGraph = flamegraph()
       .width(width)
       .cellHeight(18)
       .minFrameSize(1)
       .transitionDuration(750)
-      .transitionEase(d3.easeCubic)
       .inverted(true)
       .sort(true)
       .title('')
       .tooltip(false)
-      .details(document.getElementById('flamegraphdetails'));
+      .setDetailsElement(document.getElementById('flamegraphdetails'));
 
     // <full name> (percentage, value)
     flameGraph.label((d) => d.data.f + ' (' + d.data.p + ', ' + d.data.l + ')');
 
-    (function(flameGraph) {
-      var oldColorMapper = flameGraph.color();
-      function colorMapper(d) {
-        // Hack to force default color mapper to use 'warm' color scheme by not passing libtype
-        const { data, highlight } = d;
-        return oldColorMapper({ data: { n: data.n }, highlight });
-      }
-
-      flameGraph.color(colorMapper);
-    }(flameGraph));
+    flameGraph.setColorHue('warm');
 
-    d3.select('#chart')
+    select('#chart')
       .datum(data)
       .call(flameGraph);
 
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go b/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
index 6447092d3d..718481b078 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
@@ -165,9 +165,9 @@ func GetBuildID(binary io.ReaderAt) ([]byte, error) {
 	return nil, nil
 }
 
-// kernelBase caluclates the base for kernel mappings, which usually require
+// kernelBase calculates the base for kernel mappings, which usually require
 // special handling. For kernel mappings, tools (like perf) use the address of
-// the kernel relocation symbol (_text or _stext) as the mmap start. Additionaly,
+// the kernel relocation symbol (_text or _stext) as the mmap start. Additionally,
 // for obfuscation, ChromeOS profiles have the kernel image remapped to the 0-th page.
 func kernelBase(loadSegment *elf.ProgHeader, stextOffset *uint64, start, limit, offset uint64) (uint64, bool) {
 	const (
@@ -217,7 +217,7 @@ func kernelBase(loadSegment *elf.ProgHeader, stextOffset *uint64, start, limit,
 // GetBase determines the base address to subtract from virtual
 // address to get symbol table address. For an executable, the base
 // is 0. Otherwise, it's a shared library, and the base is the
-// address where the mapping starts. The kernel needs special hanldling.
+// address where the mapping starts. The kernel needs special handling.
 func GetBase(fh *elf.FileHeader, loadSegment *elf.ProgHeader, stextOffset *uint64, start, limit, offset uint64) (uint64, error) {
 
 	if start == 0 && offset == 0 && (limit == ^uint64(0) || limit == 0) {
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/graph/dotgraph.go b/src/cmd/vendor/github.com/google/pprof/internal/graph/dotgraph.go
index 8008675248..9ff4c95adb 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/graph/dotgraph.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/graph/dotgraph.go
@@ -126,7 +126,7 @@ func (b *builder) addLegend() {
 		return
 	}
 	title := labels[0]
-	fmt.Fprintf(b, `subgraph cluster_L { "%s" [shape=box fontsize=16`, title)
+	fmt.Fprintf(b, `subgraph cluster_L { "%s" [shape=box fontsize=16`, escapeForDot(title))
 	fmt.Fprintf(b, ` label="%s\l"`, strings.Join(escapeAllForDot(labels), `\l`))
 	if b.config.LegendURL != "" {
 		fmt.Fprintf(b, ` URL="%s" target="_blank"`, b.config.LegendURL)
@@ -485,7 +485,7 @@ func escapeAllForDot(in []string) []string {
 
 // escapeForDot escapes double quotes and backslashes, and replaces Graphviz's
 // "center" character (\n) with a left-justified character.
-// See https://graphviz.org/doc/info/attrs.html#k:escString for more info.
+// See https://graphviz.org/docs/attr-types/escString/ for more info.
 func escapeForDot(str string) string {
 	return strings.ReplaceAll(strings.ReplaceAll(strings.ReplaceAll(str, `\`, `\\`), `"`, `\"`), "\n", `\l`)
 }
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go b/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
index a57a0b20a9..98eb1dd817 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
@@ -109,8 +109,10 @@ type MappingSources map[string][]struct {
 type ObjTool interface {
 	// Open opens the named object file. If the object is a shared
 	// library, start/limit/offset are the addresses where it is mapped
-	// into memory in the address space being inspected.
-	Open(file string, start, limit, offset uint64) (ObjFile, error)
+	// into memory in the address space being inspected. If the object
+	// is a linux kernel, relocationSymbol is the name of the symbol
+	// corresponding to the start address.
+	Open(file string, start, limit, offset uint64, relocationSymbol string) (ObjFile, error)
 
 	// Disasm disassembles the named object file, starting at
 	// the start address and stopping at (before) the end address.
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
index e2fb00314c..36ddf2e934 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
@@ -526,7 +526,7 @@ func symbolsFromBinaries(prof *profile.Profile, g *graph.Graph, rx *regexp.Regex
 			}
 		}
 
-		f, err := obj.Open(m.File, m.Start, m.Limit, m.Offset)
+		f, err := obj.Open(m.File, m.Start, m.Limit, m.Offset, m.KernelRelocationSymbol)
 		if err != nil {
 			fmt.Printf("%v\n", err)
 			continue
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/source.go b/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
index 33d04c591d..d8b4395265 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
@@ -744,7 +744,7 @@ func (sp *sourcePrinter) objectFile(m *profile.Mapping) plugin.ObjFile {
 	if object, ok := sp.objects[m.File]; ok {
 		return object // May be nil if we detected an error earlier.
 	}
-	object, err := sp.objectTool.Open(m.File, m.Start, m.Limit, m.Offset)
+	object, err := sp.objectTool.Open(m.File, m.Start, m.Limit, m.Offset, m.KernelRelocationSymbol)
 	if err != nil {
 		object = nil
 	}
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/symbolizer/symbolizer.go b/src/cmd/vendor/github.com/google/pprof/internal/symbolizer/symbolizer.go
index d741e7ad7f..cbb0ed4d1b 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/symbolizer/symbolizer.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/symbolizer/symbolizer.go
@@ -325,7 +325,10 @@ func newMapping(prof *profile.Profile, obj plugin.ObjTool, ui plugin.UI, force b
 		}
 
 		name := filepath.Base(m.File)
-		f, err := obj.Open(m.File, m.Start, m.Limit, m.Offset)
+		if m.BuildID != "" {
+			name += fmt.Sprintf(" (build ID %s)", m.BuildID)
+		}
+		f, err := obj.Open(m.File, m.Start, m.Limit, m.Offset, m.KernelRelocationSymbol)
 		if err != nil {
 			ui.PrintErr("Local symbolization failed for ", name, ": ", err)
 			missingBinaries = true
diff --git a/src/cmd/vendor/github.com/google/pprof/profile/encode.go b/src/cmd/vendor/github.com/google/pprof/profile/encode.go
index ab7f03ae26..96aa271e54 100644
--- a/src/cmd/vendor/github.com/google/pprof/profile/encode.go
+++ b/src/cmd/vendor/github.com/google/pprof/profile/encode.go
@@ -17,6 +17,7 @@ package profile
 import (
 	"errors"
 	"sort"
+	"strings"
 )
 
 func (p *Profile) decoder() []decoder {
@@ -252,6 +253,14 @@ func (p *Profile) postDecode() error {
 		} else {
 			mappings[m.ID] = m
 		}
+
+		// If this a main linux kernel mapping with a relocation symbol suffix
+		// ("[kernel.kallsyms]_text"), extract said suffix.
+		// It is fairly hacky to handle at this level, but the alternatives appear even worse.
+		if strings.HasPrefix(m.File, "[kernel.kallsyms]") {
+			m.KernelRelocationSymbol = strings.ReplaceAll(m.File, "[kernel.kallsyms]", "")
+		}
+
 	}
 
 	functions := make(map[uint64]*Function, len(p.Function))
diff --git a/src/cmd/vendor/github.com/google/pprof/profile/merge.go b/src/cmd/vendor/github.com/google/pprof/profile/merge.go
index 9978e7330e..6fcd11de19 100644
--- a/src/cmd/vendor/github.com/google/pprof/profile/merge.go
+++ b/src/cmd/vendor/github.com/google/pprof/profile/merge.go
@@ -303,16 +303,17 @@ func (pm *profileMerger) mapMapping(src *Mapping) mapInfo {
 		return mi
 	}
 	m := &Mapping{
-		ID:              uint64(len(pm.p.Mapping) + 1),
-		Start:           src.Start,
-		Limit:           src.Limit,
-		Offset:          src.Offset,
-		File:            src.File,
-		BuildID:         src.BuildID,
-		HasFunctions:    src.HasFunctions,
-		HasFilenames:    src.HasFilenames,
-		HasLineNumbers:  src.HasLineNumbers,
-		HasInlineFrames: src.HasInlineFrames,
+		ID:                     uint64(len(pm.p.Mapping) + 1),
+		Start:                  src.Start,
+		Limit:                  src.Limit,
+		Offset:                 src.Offset,
+		File:                   src.File,
+		KernelRelocationSymbol: src.KernelRelocationSymbol,
+		BuildID:                src.BuildID,
+		HasFunctions:           src.HasFunctions,
+		HasFilenames:           src.HasFilenames,
+		HasLineNumbers:         src.HasLineNumbers,
+		HasInlineFrames:        src.HasInlineFrames,
 	}
 	pm.p.Mapping = append(pm.p.Mapping, m)
 
diff --git a/src/cmd/vendor/github.com/google/pprof/profile/profile.go b/src/cmd/vendor/github.com/google/pprof/profile/profile.go
index 2590c8ddb4..5a3807f978 100644
--- a/src/cmd/vendor/github.com/google/pprof/profile/profile.go
+++ b/src/cmd/vendor/github.com/google/pprof/profile/profile.go
@@ -106,6 +106,15 @@ type Mapping struct {
 
 	fileX    int64
 	buildIDX int64
+
+	// Name of the kernel relocation symbol ("_text" or "_stext"), extracted from File.
+	// For linux kernel mappings generated by some tools, correct symbolization depends
+	// on knowing which of the two possible relocation symbols was used for `Start`.
+	// This is given to us as a suffix in `File` (e.g. "[kernel.kallsyms]_stext").
+	//
+	// Note, this public field is not persisted in the proto. For the purposes of
+	// copying / merging / hashing profiles, it is considered subsumed by `File`.
+	KernelRelocationSymbol string
 }
 
 // Location corresponds to Profile.Location
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3/LICENSE b/src/cmd/vendor/github.com/google/pprof/third_party/d3/LICENSE
deleted file mode 100644
index 1d9d875edb..0000000000
--- a/src/cmd/vendor/github.com/google/pprof/third_party/d3/LICENSE
+++ /dev/null
@@ -1,27 +0,0 @@
-Copyright 2010-2017 Mike Bostock
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
-
-* Neither the name of the author nor the names of contributors may be used to
-  endorse or promote products derived from this software without specific prior
-  written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3/README.md b/src/cmd/vendor/github.com/google/pprof/third_party/d3/README.md
deleted file mode 100644
index 53e6eb61eb..0000000000
--- a/src/cmd/vendor/github.com/google/pprof/third_party/d3/README.md
+++ /dev/null
@@ -1,119 +0,0 @@
-# Building a customized D3.js bundle
-
-The D3.js version distributed with pprof is customized to only include the modules required by pprof.
-
-## Dependencies
-
-First, it's necessary to pull all bundle dependencies. We will use a JavaScript package manager, [npm](https://www.npmjs.com/), to accomplish that. npm dependencies are declared in a `package.json` file, so create one with the following configuration:
-
-```js
-{
-  "name": "d3-pprof",
-  "version": "1.0.0",
-  "description": "A d3.js bundle for pprof.",
-  "scripts": {
-    "prepare": "rollup -c && uglifyjs d3.js -c -m -o d3.min.js"
-  },
-  "license": "Apache-2.0",
-  "devDependencies": {
-    "d3-selection": "1.1.0",
-    "d3-hierarchy": "1.1.5",
-    "d3-scale": "1.0.6",
-    "d3-format": "1.2.0",
-    "d3-ease": "1.0.3",
-    "d3-array": "1.2.1",
-    "d3-collection": "1.0.4",
-    "d3-transition": "1.1.0",
-    "rollup": "0.51.8",
-    "rollup-plugin-node-resolve": "3",
-    "uglify-js": "3.1.10"
-  }
-}
-```
-
-Besides the bundle dependencies, the `package.json` file also specifies a script called `prepare`, which will be executed to create the bundle after `Rollup` is installed.
-
-## Bundler
-
-The simplest way of creating a custom bundle is to use a bundler, such as [Rollup](https://rollupjs.org/) or [Webpack](https://webpack.js.org/). Rollup will be used in this example.
-
-First, create a `rollup.config.js` file, containing the configuration Rollup should use to build the bundle.
-
-```js
-import node from "rollup-plugin-node-resolve";
-
-export default {
-  input: "index.js",
-  output: {
-    format: "umd",
-    file: "d3.js"
-  },
-  name: "d3",
-  plugins: [node()],
-  sourcemap: false
-};
-```
-
-Then create an `index.js` file containing all the functions that need to be exported in the bundle.
-
-```js
-export {
-  select,
-  selection,
-  event,
-} from "d3-selection";
-
-export {
-    hierarchy,
-    partition,
-} from "d3-hierarchy";
-
-export {
-    scaleLinear,
-} from "d3-scale";
-
-export {
-    format,
-} from "d3-format";
-
-export {
-    easeCubic,
-} from "d3-ease";
-
-export {
-    ascending,
-} from "d3-array";
-
-export {
-    map,
-} from "d3-collection";
-
-export {
-    transition,
-} from "d3-transition";
-```
-
-## Building
-
-Once all files were created, execute the following commands to pull all dependencies and build the bundle.
-
-```
-% npm install
-% npm run prepare
-```
-
-This will create two files, `d3.js` and `d3.min.js`, the custom D3.js bundle and its minified version respectively.
-
-# References
-
-## D3 Custom Bundle
-
-A demonstration of building a custom D3 4.0 bundle using ES2015 modules and Rollup. 
-
-[bl.ocks.org/mbostock/bb09af4c39c79cffcde4](https://bl.ocks.org/mbostock/bb09af4c39c79cffcde4)
-
-## d3-pprof
-
-A repository containing all previously mentioned configuration files and the generated custom bundle.
-
-[github.com/spiermar/d3-pprof](https://github.com/spiermar/d3-pprof)
\ No newline at end of file
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3/d3.go b/src/cmd/vendor/github.com/google/pprof/third_party/d3/d3.go
deleted file mode 100644
index 7d217c71bf..0000000000
--- a/src/cmd/vendor/github.com/google/pprof/third_party/d3/d3.go
+++ /dev/null
@@ -1,4675 +0,0 @@
-// D3.js is a JavaScript library for manipulating documents based on data.
-// https://github.com/d3/d3
-// See LICENSE file for license details
-// Custom build for pprof (https://github.com/spiermar/d3-pprof)
-
-package d3
-
-// JSSource returns the d3.js file
-const JSSource = `
-(function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-	typeof define === 'function' && define.amd ? define(['exports'], factory) :
-	(factory((global.d3 = {})));
-}(this, (function (exports) { 'use strict';
-
-var xhtml = "http://www.w3.org/1999/xhtml";
-
-var namespaces = {
-  svg: "http://www.w3.org/2000/svg",
-  xhtml: xhtml,
-  xlink: "http://www.w3.org/1999/xlink",
-  xml: "http://www.w3.org/XML/1998/namespace",
-  xmlns: "http://www.w3.org/2000/xmlns/"
-};
-
-var namespace = function(name) {
-  var prefix = name += "", i = prefix.indexOf(":");
-  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
-  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
-};
-
-function creatorInherit(name) {
-  return function() {
-    var document = this.ownerDocument,
-        uri = this.namespaceURI;
-    return uri === xhtml && document.documentElement.namespaceURI === xhtml
-        ? document.createElement(name)
-        : document.createElementNS(uri, name);
-  };
-}
-
-function creatorFixed(fullname) {
-  return function() {
-    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-  };
-}
-
-var creator = function(name) {
-  var fullname = namespace(name);
-  return (fullname.local
-      ? creatorFixed
-      : creatorInherit)(fullname);
-};
-
-var matcher = function(selector) {
-  return function() {
-    return this.matches(selector);
-  };
-};
-
-if (typeof document !== "undefined") {
-  var element = document.documentElement;
-  if (!element.matches) {
-    var vendorMatches = element.webkitMatchesSelector
-        || element.msMatchesSelector
-        || element.mozMatchesSelector
-        || element.oMatchesSelector;
-    matcher = function(selector) {
-      return function() {
-        return vendorMatches.call(this, selector);
-      };
-    };
-  }
-}
-
-var matcher$1 = matcher;
-
-var filterEvents = {};
-
-exports.event = null;
-
-if (typeof document !== "undefined") {
-  var element$1 = document.documentElement;
-  if (!("onmouseenter" in element$1)) {
-    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
-  }
-}
-
-function filterContextListener(listener, index, group) {
-  listener = contextListener(listener, index, group);
-  return function(event) {
-    var related = event.relatedTarget;
-    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-      listener.call(this, event);
-    }
-  };
-}
-
-function contextListener(listener, index, group) {
-  return function(event1) {
-    var event0 = exports.event; // Events can be reentrant (e.g., focus).
-    exports.event = event1;
-    try {
-      listener.call(this, this.__data__, index, group);
-    } finally {
-      exports.event = event0;
-    }
-  };
-}
-
-function parseTypenames(typenames) {
-  return typenames.trim().split(/^|\s+/).map(function(t) {
-    var name = "", i = t.indexOf(".");
-    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
-    return {type: t, name: name};
-  });
-}
-
-function onRemove(typename) {
-  return function() {
-    var on = this.__on;
-    if (!on) return;
-    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-        this.removeEventListener(o.type, o.listener, o.capture);
-      } else {
-        on[++i] = o;
-      }
-    }
-    if (++i) on.length = i;
-    else delete this.__on;
-  };
-}
-
-function onAdd(typename, value, capture) {
-  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-  return function(d, i, group) {
-    var on = this.__on, o, listener = wrap(value, i, group);
-    if (on) for (var j = 0, m = on.length; j < m; ++j) {
-      if ((o = on[j]).type === typename.type && o.name === typename.name) {
-        this.removeEventListener(o.type, o.listener, o.capture);
-        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-        o.value = value;
-        return;
-      }
-    }
-    this.addEventListener(typename.type, listener, capture);
-    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-    if (!on) this.__on = [o];
-    else on.push(o);
-  };
-}
-
-var selection_on = function(typename, value, capture) {
-  var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
-
-  if (arguments.length < 2) {
-    var on = this.node().__on;
-    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
-      for (i = 0, o = on[j]; i < n; ++i) {
-        if ((t = typenames[i]).type === o.type && t.name === o.name) {
-          return o.value;
-        }
-      }
-    }
-    return;
-  }
-
-  on = value ? onAdd : onRemove;
-  if (capture == null) capture = false;
-  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
-  return this;
-};
-
-function none() {}
-
-var selector = function(selector) {
-  return selector == null ? none : function() {
-    return this.querySelector(selector);
-  };
-};
-
-var selection_select = function(select) {
-  if (typeof select !== "function") select = selector(select);
-
-  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-        if ("__data__" in node) subnode.__data__ = node.__data__;
-        subgroup[i] = subnode;
-      }
-    }
-  }
-
-  return new Selection(subgroups, this._parents);
-};
-
-function empty() {
-  return [];
-}
-
-var selectorAll = function(selector) {
-  return selector == null ? empty : function() {
-    return this.querySelectorAll(selector);
-  };
-};
-
-var selection_selectAll = function(select) {
-  if (typeof select !== "function") select = selectorAll(select);
-
-  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-      if (node = group[i]) {
-        subgroups.push(select.call(node, node.__data__, i, group));
-        parents.push(node);
-      }
-    }
-  }
-
-  return new Selection(subgroups, parents);
-};
-
-var selection_filter = function(match) {
-  if (typeof match !== "function") match = matcher$1(match);
-
-  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-        subgroup.push(node);
-      }
-    }
-  }
-
-  return new Selection(subgroups, this._parents);
-};
-
-var sparse = function(update) {
-  return new Array(update.length);
-};
-
-var selection_enter = function() {
-  return new Selection(this._enter || this._groups.map(sparse), this._parents);
-};
-
-function EnterNode(parent, datum) {
-  this.ownerDocument = parent.ownerDocument;
-  this.namespaceURI = parent.namespaceURI;
-  this._next = null;
-  this._parent = parent;
-  this.__data__ = datum;
-}
-
-EnterNode.prototype = {
-  constructor: EnterNode,
-  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
-  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
-  querySelector: function(selector) { return this._parent.querySelector(selector); },
-  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
-};
-
-var constant = function(x) {
-  return function() {
-    return x;
-  };
-};
-
-var keyPrefix = "$"; // Protect against keys like “__proto__”.
-
-function bindIndex(parent, group, enter, update, exit, data) {
-  var i = 0,
-      node,
-      groupLength = group.length,
-      dataLength = data.length;
-
-  // Put any non-null nodes that fit into update.
-  // Put any null nodes into enter.
-  // Put any remaining data into enter.
-  for (; i < dataLength; ++i) {
-    if (node = group[i]) {
-      node.__data__ = data[i];
-      update[i] = node;
-    } else {
-      enter[i] = new EnterNode(parent, data[i]);
-    }
-  }
-
-  // Put any non-null nodes that don’t fit into exit.
-  for (; i < groupLength; ++i) {
-    if (node = group[i]) {
-      exit[i] = node;
-    }
-  }
-}
-
-function bindKey(parent, group, enter, update, exit, data, key) {
-  var i,
-      node,
-      nodeByKeyValue = {},
-      groupLength = group.length,
-      dataLength = data.length,
-      keyValues = new Array(groupLength),
-      keyValue;
-
-  // Compute the key for each node.
-  // If multiple nodes have the same key, the duplicates are added to exit.
-  for (i = 0; i < groupLength; ++i) {
-    if (node = group[i]) {
-      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
-      if (keyValue in nodeByKeyValue) {
-        exit[i] = node;
-      } else {
-        nodeByKeyValue[keyValue] = node;
-      }
-    }
-  }
-
-  // Compute the key for each datum.
-  // If there a node associated with this key, join and add it to update.
-  // If there is not (or the key is a duplicate), add it to enter.
-  for (i = 0; i < dataLength; ++i) {
-    keyValue = keyPrefix + key.call(parent, data[i], i, data);
-    if (node = nodeByKeyValue[keyValue]) {
-      update[i] = node;
-      node.__data__ = data[i];
-      nodeByKeyValue[keyValue] = null;
-    } else {
-      enter[i] = new EnterNode(parent, data[i]);
-    }
-  }
-
-  // Add any remaining nodes that were not bound to data to exit.
-  for (i = 0; i < groupLength; ++i) {
-    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
-      exit[i] = node;
-    }
-  }
-}
-
-var selection_data = function(value, key) {
-  if (!value) {
-    data = new Array(this.size()), j = -1;
-    this.each(function(d) { data[++j] = d; });
-    return data;
-  }
-
-  var bind = key ? bindKey : bindIndex,
-      parents = this._parents,
-      groups = this._groups;
-
-  if (typeof value !== "function") value = constant(value);
-
-  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
-    var parent = parents[j],
-        group = groups[j],
-        groupLength = group.length,
-        data = value.call(parent, parent && parent.__data__, j, parents),
-        dataLength = data.length,
-        enterGroup = enter[j] = new Array(dataLength),
-        updateGroup = update[j] = new Array(dataLength),
-        exitGroup = exit[j] = new Array(groupLength);
-
-    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
-
-    // Now connect the enter nodes to their following update node, such that
-    // appendChild can insert the materialized enter node before this node,
-    // rather than at the end of the parent node.
-    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-      if (previous = enterGroup[i0]) {
-        if (i0 >= i1) i1 = i0 + 1;
-        while (!(next = updateGroup[i1]) && ++i1 < dataLength);
-        previous._next = next || null;
-      }
-    }
-  }
-
-  update = new Selection(update, parents);
-  update._enter = enter;
-  update._exit = exit;
-  return update;
-};
-
-var selection_exit = function() {
-  return new Selection(this._exit || this._groups.map(sparse), this._parents);
-};
-
-var selection_merge = function(selection$$1) {
-
-  for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-      if (node = group0[i] || group1[i]) {
-        merge[i] = node;
-      }
-    }
-  }
-
-  for (; j < m0; ++j) {
-    merges[j] = groups0[j];
-  }
-
-  return new Selection(merges, this._parents);
-};
-
-var selection_order = function() {
-
-  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
-    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
-      if (node = group[i]) {
-        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
-        next = node;
-      }
-    }
-  }
-
-  return this;
-};
-
-var selection_sort = function(compare) {
-  if (!compare) compare = ascending;
-
-  function compareNode(a, b) {
-    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
-  }
-
-  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
-      if (node = group[i]) {
-        sortgroup[i] = node;
-      }
-    }
-    sortgroup.sort(compareNode);
-  }
-
-  return new Selection(sortgroups, this._parents).order();
-};
-
-function ascending(a, b) {
-  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-}
-
-var selection_call = function() {
-  var callback = arguments[0];
-  arguments[0] = this;
-  callback.apply(null, arguments);
-  return this;
-};
-
-var selection_nodes = function() {
-  var nodes = new Array(this.size()), i = -1;
-  this.each(function() { nodes[++i] = this; });
-  return nodes;
-};
-
-var selection_node = function() {
-
-  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
-      var node = group[i];
-      if (node) return node;
-    }
-  }
-
-  return null;
-};
-
-var selection_size = function() {
-  var size = 0;
-  this.each(function() { ++size; });
-  return size;
-};
-
-var selection_empty = function() {
-  return !this.node();
-};
-
-var selection_each = function(callback) {
-
-  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
-      if (node = group[i]) callback.call(node, node.__data__, i, group);
-    }
-  }
-
-  return this;
-};
-
-function attrRemove(name) {
-  return function() {
-    this.removeAttribute(name);
-  };
-}
-
-function attrRemoveNS(fullname) {
-  return function() {
-    this.removeAttributeNS(fullname.space, fullname.local);
-  };
-}
-
-function attrConstant(name, value) {
-  return function() {
-    this.setAttribute(name, value);
-  };
-}
-
-function attrConstantNS(fullname, value) {
-  return function() {
-    this.setAttributeNS(fullname.space, fullname.local, value);
-  };
-}
-
-function attrFunction(name, value) {
-  return function() {
-    var v = value.apply(this, arguments);
-    if (v == null) this.removeAttribute(name);
-    else this.setAttribute(name, v);
-  };
-}
-
-function attrFunctionNS(fullname, value) {
-  return function() {
-    var v = value.apply(this, arguments);
-    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
-    else this.setAttributeNS(fullname.space, fullname.local, v);
-  };
-}
-
-var selection_attr = function(name, value) {
-  var fullname = namespace(name);
-
-  if (arguments.length < 2) {
-    var node = this.node();
-    return fullname.local
-        ? node.getAttributeNS(fullname.space, fullname.local)
-        : node.getAttribute(fullname);
-  }
-
-  return this.each((value == null
-      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
-      ? (fullname.local ? attrFunctionNS : attrFunction)
-      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
-};
-
-var defaultView = function(node) {
-  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
-      || (node.document && node) // node is a Window
-      || node.defaultView; // node is a Document
-};
-
-function styleRemove(name) {
-  return function() {
-    this.style.removeProperty(name);
-  };
-}
-
-function styleConstant(name, value, priority) {
-  return function() {
-    this.style.setProperty(name, value, priority);
-  };
-}
-
-function styleFunction(name, value, priority) {
-  return function() {
-    var v = value.apply(this, arguments);
-    if (v == null) this.style.removeProperty(name);
-    else this.style.setProperty(name, v, priority);
-  };
-}
-
-var selection_style = function(name, value, priority) {
-  return arguments.length > 1
-      ? this.each((value == null
-            ? styleRemove : typeof value === "function"
-            ? styleFunction
-            : styleConstant)(name, value, priority == null ? "" : priority))
-      : styleValue(this.node(), name);
-};
-
-function styleValue(node, name) {
-  return node.style.getPropertyValue(name)
-      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
-}
-
-function propertyRemove(name) {
-  return function() {
-    delete this[name];
-  };
-}
-
-function propertyConstant(name, value) {
-  return function() {
-    this[name] = value;
-  };
-}
-
-function propertyFunction(name, value) {
-  return function() {
-    var v = value.apply(this, arguments);
-    if (v == null) delete this[name];
-    else this[name] = v;
-  };
-}
-
-var selection_property = function(name, value) {
-  return arguments.length > 1
-      ? this.each((value == null
-          ? propertyRemove : typeof value === "function"
-          ? propertyFunction
-          : propertyConstant)(name, value))
-      : this.node()[name];
-};
-
-function classArray(string) {
-  return string.trim().split(/^|\s+/);
-}
-
-function classList(node) {
-  return node.classList || new ClassList(node);
-}
-
-function ClassList(node) {
-  this._node = node;
-  this._names = classArray(node.getAttribute("class") || "");
-}
-
-ClassList.prototype = {
-  add: function(name) {
-    var i = this._names.indexOf(name);
-    if (i < 0) {
-      this._names.push(name);
-      this._node.setAttribute("class", this._names.join(" "));
-    }
-  },
-  remove: function(name) {
-    var i = this._names.indexOf(name);
-    if (i >= 0) {
-      this._names.splice(i, 1);
-      this._node.setAttribute("class", this._names.join(" "));
-    }
-  },
-  contains: function(name) {
-    return this._names.indexOf(name) >= 0;
-  }
-};
-
-function classedAdd(node, names) {
-  var list = classList(node), i = -1, n = names.length;
-  while (++i < n) list.add(names[i]);
-}
-
-function classedRemove(node, names) {
-  var list = classList(node), i = -1, n = names.length;
-  while (++i < n) list.remove(names[i]);
-}
-
-function classedTrue(names) {
-  return function() {
-    classedAdd(this, names);
-  };
-}
-
-function classedFalse(names) {
-  return function() {
-    classedRemove(this, names);
-  };
-}
-
-function classedFunction(names, value) {
-  return function() {
-    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
-  };
-}
-
-var selection_classed = function(name, value) {
-  var names = classArray(name + "");
-
-  if (arguments.length < 2) {
-    var list = classList(this.node()), i = -1, n = names.length;
-    while (++i < n) if (!list.contains(names[i])) return false;
-    return true;
-  }
-
-  return this.each((typeof value === "function"
-      ? classedFunction : value
-      ? classedTrue
-      : classedFalse)(names, value));
-};
-
-function textRemove() {
-  this.textContent = "";
-}
-
-function textConstant(value) {
-  return function() {
-    this.textContent = value;
-  };
-}
-
-function textFunction(value) {
-  return function() {
-    var v = value.apply(this, arguments);
-    this.textContent = v == null ? "" : v;
-  };
-}
-
-var selection_text = function(value) {
-  return arguments.length
-      ? this.each(value == null
-          ? textRemove : (typeof value === "function"
-          ? textFunction
-          : textConstant)(value))
-      : this.node().textContent;
-};
-
-function htmlRemove() {
-  this.innerHTML = "";
-}
-
-function htmlConstant(value) {
-  return function() {
-    this.innerHTML = value;
-  };
-}
-
-function htmlFunction(value) {
-  return function() {
-    var v = value.apply(this, arguments);
-    this.innerHTML = v == null ? "" : v;
-  };
-}
-
-var selection_html = function(value) {
-  return arguments.length
-      ? this.each(value == null
-          ? htmlRemove : (typeof value === "function"
-          ? htmlFunction
-          : htmlConstant)(value))
-      : this.node().innerHTML;
-};
-
-function raise() {
-  if (this.nextSibling) this.parentNode.appendChild(this);
-}
-
-var selection_raise = function() {
-  return this.each(raise);
-};
-
-function lower() {
-  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
-}
-
-var selection_lower = function() {
-  return this.each(lower);
-};
-
-var selection_append = function(name) {
-  var create = typeof name === "function" ? name : creator(name);
-  return this.select(function() {
-    return this.appendChild(create.apply(this, arguments));
-  });
-};
-
-function constantNull() {
-  return null;
-}
-
-var selection_insert = function(name, before) {
-  var create = typeof name === "function" ? name : creator(name),
-      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
-  return this.select(function() {
-    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
-  });
-};
-
-function remove() {
-  var parent = this.parentNode;
-  if (parent) parent.removeChild(this);
-}
-
-var selection_remove = function() {
-  return this.each(remove);
-};
-
-var selection_datum = function(value) {
-  return arguments.length
-      ? this.property("__data__", value)
-      : this.node().__data__;
-};
-
-function dispatchEvent(node, type, params) {
-  var window = defaultView(node),
-      event = window.CustomEvent;
-
-  if (typeof event === "function") {
-    event = new event(type, params);
-  } else {
-    event = window.document.createEvent("Event");
-    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
-    else event.initEvent(type, false, false);
-  }
-
-  node.dispatchEvent(event);
-}
-
-function dispatchConstant(type, params) {
-  return function() {
-    return dispatchEvent(this, type, params);
-  };
-}
-
-function dispatchFunction(type, params) {
-  return function() {
-    return dispatchEvent(this, type, params.apply(this, arguments));
-  };
-}
-
-var selection_dispatch = function(type, params) {
-  return this.each((typeof params === "function"
-      ? dispatchFunction
-      : dispatchConstant)(type, params));
-};
-
-var root = [null];
-
-function Selection(groups, parents) {
-  this._groups = groups;
-  this._parents = parents;
-}
-
-function selection() {
-  return new Selection([[document.documentElement]], root);
-}
-
-Selection.prototype = selection.prototype = {
-  constructor: Selection,
-  select: selection_select,
-  selectAll: selection_selectAll,
-  filter: selection_filter,
-  data: selection_data,
-  enter: selection_enter,
-  exit: selection_exit,
-  merge: selection_merge,
-  order: selection_order,
-  sort: selection_sort,
-  call: selection_call,
-  nodes: selection_nodes,
-  node: selection_node,
-  size: selection_size,
-  empty: selection_empty,
-  each: selection_each,
-  attr: selection_attr,
-  style: selection_style,
-  property: selection_property,
-  classed: selection_classed,
-  text: selection_text,
-  html: selection_html,
-  raise: selection_raise,
-  lower: selection_lower,
-  append: selection_append,
-  insert: selection_insert,
-  remove: selection_remove,
-  datum: selection_datum,
-  on: selection_on,
-  dispatch: selection_dispatch
-};
-
-var select = function(selector) {
-  return typeof selector === "string"
-      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
-      : new Selection([[selector]], root);
-};
-
-function count(node) {
-  var sum = 0,
-      children = node.children,
-      i = children && children.length;
-  if (!i) sum = 1;
-  else while (--i >= 0) sum += children[i].value;
-  node.value = sum;
-}
-
-var node_count = function() {
-  return this.eachAfter(count);
-};
-
-var node_each = function(callback) {
-  var node = this, current, next = [node], children, i, n;
-  do {
-    current = next.reverse(), next = [];
-    while (node = current.pop()) {
-      callback(node), children = node.children;
-      if (children) for (i = 0, n = children.length; i < n; ++i) {
-        next.push(children[i]);
-      }
-    }
-  } while (next.length);
-  return this;
-};
-
-var node_eachBefore = function(callback) {
-  var node = this, nodes = [node], children, i;
-  while (node = nodes.pop()) {
-    callback(node), children = node.children;
-    if (children) for (i = children.length - 1; i >= 0; --i) {
-      nodes.push(children[i]);
-    }
-  }
-  return this;
-};
-
-var node_eachAfter = function(callback) {
-  var node = this, nodes = [node], next = [], children, i, n;
-  while (node = nodes.pop()) {
-    next.push(node), children = node.children;
-    if (children) for (i = 0, n = children.length; i < n; ++i) {
-      nodes.push(children[i]);
-    }
-  }
-  while (node = next.pop()) {
-    callback(node);
-  }
-  return this;
-};
-
-var node_sum = function(value) {
-  return this.eachAfter(function(node) {
-    var sum = +value(node.data) || 0,
-        children = node.children,
-        i = children && children.length;
-    while (--i >= 0) sum += children[i].value;
-    node.value = sum;
-  });
-};
-
-var node_sort = function(compare) {
-  return this.eachBefore(function(node) {
-    if (node.children) {
-      node.children.sort(compare);
-    }
-  });
-};
-
-var node_path = function(end) {
-  var start = this,
-      ancestor = leastCommonAncestor(start, end),
-      nodes = [start];
-  while (start !== ancestor) {
-    start = start.parent;
-    nodes.push(start);
-  }
-  var k = nodes.length;
-  while (end !== ancestor) {
-    nodes.splice(k, 0, end);
-    end = end.parent;
-  }
-  return nodes;
-};
-
-function leastCommonAncestor(a, b) {
-  if (a === b) return a;
-  var aNodes = a.ancestors(),
-      bNodes = b.ancestors(),
-      c = null;
-  a = aNodes.pop();
-  b = bNodes.pop();
-  while (a === b) {
-    c = a;
-    a = aNodes.pop();
-    b = bNodes.pop();
-  }
-  return c;
-}
-
-var node_ancestors = function() {
-  var node = this, nodes = [node];
-  while (node = node.parent) {
-    nodes.push(node);
-  }
-  return nodes;
-};
-
-var node_descendants = function() {
-  var nodes = [];
-  this.each(function(node) {
-    nodes.push(node);
-  });
-  return nodes;
-};
-
-var node_leaves = function() {
-  var leaves = [];
-  this.eachBefore(function(node) {
-    if (!node.children) {
-      leaves.push(node);
-    }
-  });
-  return leaves;
-};
-
-var node_links = function() {
-  var root = this, links = [];
-  root.each(function(node) {
-    if (node !== root) { // Don’t include the root’s parent, if any.
-      links.push({source: node.parent, target: node});
-    }
-  });
-  return links;
-};
-
-function hierarchy(data, children) {
-  var root = new Node(data),
-      valued = +data.value && (root.value = data.value),
-      node,
-      nodes = [root],
-      child,
-      childs,
-      i,
-      n;
-
-  if (children == null) children = defaultChildren;
-
-  while (node = nodes.pop()) {
-    if (valued) node.value = +node.data.value;
-    if ((childs = children(node.data)) && (n = childs.length)) {
-      node.children = new Array(n);
-      for (i = n - 1; i >= 0; --i) {
-        nodes.push(child = node.children[i] = new Node(childs[i]));
-        child.parent = node;
-        child.depth = node.depth + 1;
-      }
-    }
-  }
-
-  return root.eachBefore(computeHeight);
-}
-
-function node_copy() {
-  return hierarchy(this).eachBefore(copyData);
-}
-
-function defaultChildren(d) {
-  return d.children;
-}
-
-function copyData(node) {
-  node.data = node.data.data;
-}
-
-function computeHeight(node) {
-  var height = 0;
-  do node.height = height;
-  while ((node = node.parent) && (node.height < ++height));
-}
-
-function Node(data) {
-  this.data = data;
-  this.depth =
-  this.height = 0;
-  this.parent = null;
-}
-
-Node.prototype = hierarchy.prototype = {
-  constructor: Node,
-  count: node_count,
-  each: node_each,
-  eachAfter: node_eachAfter,
-  eachBefore: node_eachBefore,
-  sum: node_sum,
-  sort: node_sort,
-  path: node_path,
-  ancestors: node_ancestors,
-  descendants: node_descendants,
-  leaves: node_leaves,
-  links: node_links,
-  copy: node_copy
-};
-
-var roundNode = function(node) {
-  node.x0 = Math.round(node.x0);
-  node.y0 = Math.round(node.y0);
-  node.x1 = Math.round(node.x1);
-  node.y1 = Math.round(node.y1);
-};
-
-var treemapDice = function(parent, x0, y0, x1, y1) {
-  var nodes = parent.children,
-      node,
-      i = -1,
-      n = nodes.length,
-      k = parent.value && (x1 - x0) / parent.value;
-
-  while (++i < n) {
-    node = nodes[i], node.y0 = y0, node.y1 = y1;
-    node.x0 = x0, node.x1 = x0 += node.value * k;
-  }
-};
-
-var partition = function() {
-  var dx = 1,
-      dy = 1,
-      padding = 0,
-      round = false;
-
-  function partition(root) {
-    var n = root.height + 1;
-    root.x0 =
-    root.y0 = padding;
-    root.x1 = dx;
-    root.y1 = dy / n;
-    root.eachBefore(positionNode(dy, n));
-    if (round) root.eachBefore(roundNode);
-    return root;
-  }
-
-  function positionNode(dy, n) {
-    return function(node) {
-      if (node.children) {
-        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
-      }
-      var x0 = node.x0,
-          y0 = node.y0,
-          x1 = node.x1 - padding,
-          y1 = node.y1 - padding;
-      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
-      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
-      node.x0 = x0;
-      node.y0 = y0;
-      node.x1 = x1;
-      node.y1 = y1;
-    };
-  }
-
-  partition.round = function(x) {
-    return arguments.length ? (round = !!x, partition) : round;
-  };
-
-  partition.size = function(x) {
-    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
-  };
-
-  partition.padding = function(x) {
-    return arguments.length ? (padding = +x, partition) : padding;
-  };
-
-  return partition;
-};
-
-var ascending$1 = function(a, b) {
-  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-};
-
-var bisector = function(compare) {
-  if (compare.length === 1) compare = ascendingComparator(compare);
-  return {
-    left: function(a, x, lo, hi) {
-      if (lo == null) lo = 0;
-      if (hi == null) hi = a.length;
-      while (lo < hi) {
-        var mid = lo + hi >>> 1;
-        if (compare(a[mid], x) < 0) lo = mid + 1;
-        else hi = mid;
-      }
-      return lo;
-    },
-    right: function(a, x, lo, hi) {
-      if (lo == null) lo = 0;
-      if (hi == null) hi = a.length;
-      while (lo < hi) {
-        var mid = lo + hi >>> 1;
-        if (compare(a[mid], x) > 0) hi = mid;
-        else lo = mid + 1;
-      }
-      return lo;
-    }
-  };
-};
-
-function ascendingComparator(f) {
-  return function(d, x) {
-    return ascending$1(f(d), x);
-  };
-}
-
-var ascendingBisect = bisector(ascending$1);
-var bisectRight = ascendingBisect.right;
-
-var e10 = Math.sqrt(50);
-var e5 = Math.sqrt(10);
-var e2 = Math.sqrt(2);
-
-var ticks = function(start, stop, count) {
-  var reverse,
-      i = -1,
-      n,
-      ticks,
-      step;
-
-  stop = +stop, start = +start, count = +count;
-  if (start === stop && count > 0) return [start];
-  if (reverse = stop < start) n = start, start = stop, stop = n;
-  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
-
-  if (step > 0) {
-    start = Math.ceil(start / step);
-    stop = Math.floor(stop / step);
-    ticks = new Array(n = Math.ceil(stop - start + 1));
-    while (++i < n) ticks[i] = (start + i) * step;
-  } else {
-    start = Math.floor(start * step);
-    stop = Math.ceil(stop * step);
-    ticks = new Array(n = Math.ceil(start - stop + 1));
-    while (++i < n) ticks[i] = (start - i) / step;
-  }
-
-  if (reverse) ticks.reverse();
-
-  return ticks;
-};
-
-function tickIncrement(start, stop, count) {
-  var step = (stop - start) / Math.max(0, count),
-      power = Math.floor(Math.log(step) / Math.LN10),
-      error = step / Math.pow(10, power);
-  return power >= 0
-      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
-      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
-}
-
-function tickStep(start, stop, count) {
-  var step0 = Math.abs(stop - start) / Math.max(0, count),
-      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
-      error = step0 / step1;
-  if (error >= e10) step1 *= 10;
-  else if (error >= e5) step1 *= 5;
-  else if (error >= e2) step1 *= 2;
-  return stop < start ? -step1 : step1;
-}
-
-var prefix = "$";
-
-function Map() {}
-
-Map.prototype = map$1.prototype = {
-  constructor: Map,
-  has: function(key) {
-    return (prefix + key) in this;
-  },
-  get: function(key) {
-    return this[prefix + key];
-  },
-  set: function(key, value) {
-    this[prefix + key] = value;
-    return this;
-  },
-  remove: function(key) {
-    var property = prefix + key;
-    return property in this && delete this[property];
-  },
-  clear: function() {
-    for (var property in this) if (property[0] === prefix) delete this[property];
-  },
-  keys: function() {
-    var keys = [];
-    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
-    return keys;
-  },
-  values: function() {
-    var values = [];
-    for (var property in this) if (property[0] === prefix) values.push(this[property]);
-    return values;
-  },
-  entries: function() {
-    var entries = [];
-    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
-    return entries;
-  },
-  size: function() {
-    var size = 0;
-    for (var property in this) if (property[0] === prefix) ++size;
-    return size;
-  },
-  empty: function() {
-    for (var property in this) if (property[0] === prefix) return false;
-    return true;
-  },
-  each: function(f) {
-    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
-  }
-};
-
-function map$1(object, f) {
-  var map = new Map;
-
-  // Copy constructor.
-  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });
-
-  // Index array by numeric index or specified key function.
-  else if (Array.isArray(object)) {
-    var i = -1,
-        n = object.length,
-        o;
-
-    if (f == null) while (++i < n) map.set(i, object[i]);
-    else while (++i < n) map.set(f(o = object[i], i, object), o);
-  }
-
-  // Convert object to map.
-  else if (object) for (var key in object) map.set(key, object[key]);
-
-  return map;
-}
-
-function Set() {}
-
-var proto = map$1.prototype;
-
-Set.prototype = set.prototype = {
-  constructor: Set,
-  has: proto.has,
-  add: function(value) {
-    value += "";
-    this[prefix + value] = value;
-    return this;
-  },
-  remove: proto.remove,
-  clear: proto.clear,
-  values: proto.keys,
-  size: proto.size,
-  empty: proto.empty,
-  each: proto.each
-};
-
-function set(object, f) {
-  var set = new Set;
-
-  // Copy constructor.
-  if (object instanceof Set) object.each(function(value) { set.add(value); });
-
-  // Otherwise, assume it’s an array.
-  else if (object) {
-    var i = -1, n = object.length;
-    if (f == null) while (++i < n) set.add(object[i]);
-    else while (++i < n) set.add(f(object[i], i, object));
-  }
-
-  return set;
-}
-
-var array$1 = Array.prototype;
-
-var map$3 = array$1.map;
-var slice$2 = array$1.slice;
-
-var define = function(constructor, factory, prototype) {
-  constructor.prototype = factory.prototype = prototype;
-  prototype.constructor = constructor;
-};
-
-function extend(parent, definition) {
-  var prototype = Object.create(parent.prototype);
-  for (var key in definition) prototype[key] = definition[key];
-  return prototype;
-}
-
-function Color() {}
-
-var darker = 0.7;
-var brighter = 1 / darker;
-
-var reI = "\\s*([+-]?\\d+)\\s*";
-var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*";
-var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*";
-var reHex3 = /^#([0-9a-f]{3})$/;
-var reHex6 = /^#([0-9a-f]{6})$/;
-var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$");
-var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$");
-var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$");
-var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$");
-var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$");
-var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
-
-var named = {
-  aliceblue: 0xf0f8ff,
-  antiquewhite: 0xfaebd7,
-  aqua: 0x00ffff,
-  aquamarine: 0x7fffd4,
-  azure: 0xf0ffff,
-  beige: 0xf5f5dc,
-  bisque: 0xffe4c4,
-  black: 0x000000,
-  blanchedalmond: 0xffebcd,
-  blue: 0x0000ff,
-  blueviolet: 0x8a2be2,
-  brown: 0xa52a2a,
-  burlywood: 0xdeb887,
-  cadetblue: 0x5f9ea0,
-  chartreuse: 0x7fff00,
-  chocolate: 0xd2691e,
-  coral: 0xff7f50,
-  cornflowerblue: 0x6495ed,
-  cornsilk: 0xfff8dc,
-  crimson: 0xdc143c,
-  cyan: 0x00ffff,
-  darkblue: 0x00008b,
-  darkcyan: 0x008b8b,
-  darkgoldenrod: 0xb8860b,
-  darkgray: 0xa9a9a9,
-  darkgreen: 0x006400,
-  darkgrey: 0xa9a9a9,
-  darkkhaki: 0xbdb76b,
-  darkmagenta: 0x8b008b,
-  darkolivegreen: 0x556b2f,
-  darkorange: 0xff8c00,
-  darkorchid: 0x9932cc,
-  darkred: 0x8b0000,
-  darksalmon: 0xe9967a,
-  darkseagreen: 0x8fbc8f,
-  darkslateblue: 0x483d8b,
-  darkslategray: 0x2f4f4f,
-  darkslategrey: 0x2f4f4f,
-  darkturquoise: 0x00ced1,
-  darkviolet: 0x9400d3,
-  deeppink: 0xff1493,
-  deepskyblue: 0x00bfff,
-  dimgray: 0x696969,
-  dimgrey: 0x696969,
-  dodgerblue: 0x1e90ff,
-  firebrick: 0xb22222,
-  floralwhite: 0xfffaf0,
-  forestgreen: 0x228b22,
-  fuchsia: 0xff00ff,
-  gainsboro: 0xdcdcdc,
-  ghostwhite: 0xf8f8ff,
-  gold: 0xffd700,
-  goldenrod: 0xdaa520,
-  gray: 0x808080,
-  green: 0x008000,
-  greenyellow: 0xadff2f,
-  grey: 0x808080,
-  honeydew: 0xf0fff0,
-  hotpink: 0xff69b4,
-  indianred: 0xcd5c5c,
-  indigo: 0x4b0082,
-  ivory: 0xfffff0,
-  khaki: 0xf0e68c,
-  lavender: 0xe6e6fa,
-  lavenderblush: 0xfff0f5,
-  lawngreen: 0x7cfc00,
-  lemonchiffon: 0xfffacd,
-  lightblue: 0xadd8e6,
-  lightcoral: 0xf08080,
-  lightcyan: 0xe0ffff,
-  lightgoldenrodyellow: 0xfafad2,
-  lightgray: 0xd3d3d3,
-  lightgreen: 0x90ee90,
-  lightgrey: 0xd3d3d3,
-  lightpink: 0xffb6c1,
-  lightsalmon: 0xffa07a,
-  lightseagreen: 0x20b2aa,
-  lightskyblue: 0x87cefa,
-  lightslategray: 0x778899,
-  lightslategrey: 0x778899,
-  lightsteelblue: 0xb0c4de,
-  lightyellow: 0xffffe0,
-  lime: 0x00ff00,
-  limegreen: 0x32cd32,
-  linen: 0xfaf0e6,
-  magenta: 0xff00ff,
-  maroon: 0x800000,
-  mediumaquamarine: 0x66cdaa,
-  mediumblue: 0x0000cd,
-  mediumorchid: 0xba55d3,
-  mediumpurple: 0x9370db,
-  mediumseagreen: 0x3cb371,
-  mediumslateblue: 0x7b68ee,
-  mediumspringgreen: 0x00fa9a,
-  mediumturquoise: 0x48d1cc,
-  mediumvioletred: 0xc71585,
-  midnightblue: 0x191970,
-  mintcream: 0xf5fffa,
-  mistyrose: 0xffe4e1,
-  moccasin: 0xffe4b5,
-  navajowhite: 0xffdead,
-  navy: 0x000080,
-  oldlace: 0xfdf5e6,
-  olive: 0x808000,
-  olivedrab: 0x6b8e23,
-  orange: 0xffa500,
-  orangered: 0xff4500,
-  orchid: 0xda70d6,
-  palegoldenrod: 0xeee8aa,
-  palegreen: 0x98fb98,
-  paleturquoise: 0xafeeee,
-  palevioletred: 0xdb7093,
-  papayawhip: 0xffefd5,
-  peachpuff: 0xffdab9,
-  peru: 0xcd853f,
-  pink: 0xffc0cb,
-  plum: 0xdda0dd,
-  powderblue: 0xb0e0e6,
-  purple: 0x800080,
-  rebeccapurple: 0x663399,
-  red: 0xff0000,
-  rosybrown: 0xbc8f8f,
-  royalblue: 0x4169e1,
-  saddlebrown: 0x8b4513,
-  salmon: 0xfa8072,
-  sandybrown: 0xf4a460,
-  seagreen: 0x2e8b57,
-  seashell: 0xfff5ee,
-  sienna: 0xa0522d,
-  silver: 0xc0c0c0,
-  skyblue: 0x87ceeb,
-  slateblue: 0x6a5acd,
-  slategray: 0x708090,
-  slategrey: 0x708090,
-  snow: 0xfffafa,
-  springgreen: 0x00ff7f,
-  steelblue: 0x4682b4,
-  tan: 0xd2b48c,
-  teal: 0x008080,
-  thistle: 0xd8bfd8,
-  tomato: 0xff6347,
-  turquoise: 0x40e0d0,
-  violet: 0xee82ee,
-  wheat: 0xf5deb3,
-  white: 0xffffff,
-  whitesmoke: 0xf5f5f5,
-  yellow: 0xffff00,
-  yellowgreen: 0x9acd32
-};
-
-define(Color, color, {
-  displayable: function() {
-    return this.rgb().displayable();
-  },
-  toString: function() {
-    return this.rgb() + "";
-  }
-});
-
-function color(format) {
-  var m;
-  format = (format + "").trim().toLowerCase();
-  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
-      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
-      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
-      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
-      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
-      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
-      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
-      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-      : named.hasOwnProperty(format) ? rgbn(named[format])
-      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
-      : null;
-}
-
-function rgbn(n) {
-  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
-}
-
-function rgba(r, g, b, a) {
-  if (a <= 0) r = g = b = NaN;
-  return new Rgb(r, g, b, a);
-}
-
-function rgbConvert(o) {
-  if (!(o instanceof Color)) o = color(o);
-  if (!o) return new Rgb;
-  o = o.rgb();
-  return new Rgb(o.r, o.g, o.b, o.opacity);
-}
-
-function rgb(r, g, b, opacity) {
-  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
-}
-
-function Rgb(r, g, b, opacity) {
-  this.r = +r;
-  this.g = +g;
-  this.b = +b;
-  this.opacity = +opacity;
-}
-
-define(Rgb, rgb, extend(Color, {
-  brighter: function(k) {
-    k = k == null ? brighter : Math.pow(brighter, k);
-    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-  },
-  darker: function(k) {
-    k = k == null ? darker : Math.pow(darker, k);
-    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-  },
-  rgb: function() {
-    return this;
-  },
-  displayable: function() {
-    return (0 <= this.r && this.r <= 255)
-        && (0 <= this.g && this.g <= 255)
-        && (0 <= this.b && this.b <= 255)
-        && (0 <= this.opacity && this.opacity <= 1);
-  },
-  toString: function() {
-    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-    return (a === 1 ? "rgb(" : "rgba(")
-        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-        + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-        + (a === 1 ? ")" : ", " + a + ")");
-  }
-}));
-
-function hsla(h, s, l, a) {
-  if (a <= 0) h = s = l = NaN;
-  else if (l <= 0 || l >= 1) h = s = NaN;
-  else if (s <= 0) h = NaN;
-  return new Hsl(h, s, l, a);
-}
-
-function hslConvert(o) {
-  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
-  if (!(o instanceof Color)) o = color(o);
-  if (!o) return new Hsl;
-  if (o instanceof Hsl) return o;
-  o = o.rgb();
-  var r = o.r / 255,
-      g = o.g / 255,
-      b = o.b / 255,
-      min = Math.min(r, g, b),
-      max = Math.max(r, g, b),
-      h = NaN,
-      s = max - min,
-      l = (max + min) / 2;
-  if (s) {
-    if (r === max) h = (g - b) / s + (g < b) * 6;
-    else if (g === max) h = (b - r) / s + 2;
-    else h = (r - g) / s + 4;
-    s /= l < 0.5 ? max + min : 2 - max - min;
-    h *= 60;
-  } else {
-    s = l > 0 && l < 1 ? 0 : h;
-  }
-  return new Hsl(h, s, l, o.opacity);
-}
-
-function hsl(h, s, l, opacity) {
-  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
-}
-
-function Hsl(h, s, l, opacity) {
-  this.h = +h;
-  this.s = +s;
-  this.l = +l;
-  this.opacity = +opacity;
-}
-
-define(Hsl, hsl, extend(Color, {
-  brighter: function(k) {
-    k = k == null ? brighter : Math.pow(brighter, k);
-    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-  },
-  darker: function(k) {
-    k = k == null ? darker : Math.pow(darker, k);
-    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-  },
-  rgb: function() {
-    var h = this.h % 360 + (this.h < 0) * 360,
-        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
-        l = this.l,
-        m2 = l + (l < 0.5 ? l : 1 - l) * s,
-        m1 = 2 * l - m2;
-    return new Rgb(
-      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
-      hsl2rgb(h, m1, m2),
-      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
-      this.opacity
-    );
-  },
-  displayable: function() {
-    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
-        && (0 <= this.l && this.l <= 1)
-        && (0 <= this.opacity && this.opacity <= 1);
-  }
-}));
-
-/* From FvD 13.37, CSS Color Module Level 3 */
-function hsl2rgb(h, m1, m2) {
-  return (h < 60 ? m1 + (m2 - m1) * h / 60
-      : h < 180 ? m2
-      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
-      : m1) * 255;
-}
-
-var deg2rad = Math.PI / 180;
-var rad2deg = 180 / Math.PI;
-
-var Kn = 18;
-var Xn = 0.950470;
-var Yn = 1;
-var Zn = 1.088830;
-var t0 = 4 / 29;
-var t1 = 6 / 29;
-var t2 = 3 * t1 * t1;
-var t3 = t1 * t1 * t1;
-
-function labConvert(o) {
-  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
-  if (o instanceof Hcl) {
-    var h = o.h * deg2rad;
-    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
-  }
-  if (!(o instanceof Rgb)) o = rgbConvert(o);
-  var b = rgb2xyz(o.r),
-      a = rgb2xyz(o.g),
-      l = rgb2xyz(o.b),
-      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
-      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
-      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
-  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
-}
-
-function lab(l, a, b, opacity) {
-  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
-}
-
-function Lab(l, a, b, opacity) {
-  this.l = +l;
-  this.a = +a;
-  this.b = +b;
-  this.opacity = +opacity;
-}
-
-define(Lab, lab, extend(Color, {
-  brighter: function(k) {
-    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
-  },
-  darker: function(k) {
-    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
-  },
-  rgb: function() {
-    var y = (this.l + 16) / 116,
-        x = isNaN(this.a) ? y : y + this.a / 500,
-        z = isNaN(this.b) ? y : y - this.b / 200;
-    y = Yn * lab2xyz(y);
-    x = Xn * lab2xyz(x);
-    z = Zn * lab2xyz(z);
-    return new Rgb(
-      xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
-      xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
-      xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
-      this.opacity
-    );
-  }
-}));
-
-function xyz2lab(t) {
-  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
-}
-
-function lab2xyz(t) {
-  return t > t1 ? t * t * t : t2 * (t - t0);
-}
-
-function xyz2rgb(x) {
-  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
-}
-
-function rgb2xyz(x) {
-  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
-}
-
-function hclConvert(o) {
-  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
-  if (!(o instanceof Lab)) o = labConvert(o);
-  var h = Math.atan2(o.b, o.a) * rad2deg;
-  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
-}
-
-function hcl(h, c, l, opacity) {
-  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
-}
-
-function Hcl(h, c, l, opacity) {
-  this.h = +h;
-  this.c = +c;
-  this.l = +l;
-  this.opacity = +opacity;
-}
-
-define(Hcl, hcl, extend(Color, {
-  brighter: function(k) {
-    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
-  },
-  darker: function(k) {
-    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
-  },
-  rgb: function() {
-    return labConvert(this).rgb();
-  }
-}));
-
-var A = -0.14861;
-var B = +1.78277;
-var C = -0.29227;
-var D = -0.90649;
-var E = +1.97294;
-var ED = E * D;
-var EB = E * B;
-var BC_DA = B * C - D * A;
-
-function cubehelixConvert(o) {
-  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
-  if (!(o instanceof Rgb)) o = rgbConvert(o);
-  var r = o.r / 255,
-      g = o.g / 255,
-      b = o.b / 255,
-      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
-      bl = b - l,
-      k = (E * (g - l) - C * bl) / D,
-      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
-      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
-  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
-}
-
-function cubehelix(h, s, l, opacity) {
-  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
-}
-
-function Cubehelix(h, s, l, opacity) {
-  this.h = +h;
-  this.s = +s;
-  this.l = +l;
-  this.opacity = +opacity;
-}
-
-define(Cubehelix, cubehelix, extend(Color, {
-  brighter: function(k) {
-    k = k == null ? brighter : Math.pow(brighter, k);
-    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
-  },
-  darker: function(k) {
-    k = k == null ? darker : Math.pow(darker, k);
-    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
-  },
-  rgb: function() {
-    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
-        l = +this.l,
-        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
-        cosh = Math.cos(h),
-        sinh = Math.sin(h);
-    return new Rgb(
-      255 * (l + a * (A * cosh + B * sinh)),
-      255 * (l + a * (C * cosh + D * sinh)),
-      255 * (l + a * (E * cosh)),
-      this.opacity
-    );
-  }
-}));
-
-var constant$3 = function(x) {
-  return function() {
-    return x;
-  };
-};
-
-function linear$1(a, d) {
-  return function(t) {
-    return a + t * d;
-  };
-}
-
-function exponential(a, b, y) {
-  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
-    return Math.pow(a + t * b, y);
-  };
-}
-
-function hue(a, b) {
-  var d = b - a;
-  return d ? linear$1(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);
-}
-
-function gamma(y) {
-  return (y = +y) === 1 ? nogamma : function(a, b) {
-    return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);
-  };
-}
-
-function nogamma(a, b) {
-  var d = b - a;
-  return d ? linear$1(a, d) : constant$3(isNaN(a) ? b : a);
-}
-
-var interpolateRgb = (function rgbGamma(y) {
-  var color$$1 = gamma(y);
-
-  function rgb$$1(start, end) {
-    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
-        g = color$$1(start.g, end.g),
-        b = color$$1(start.b, end.b),
-        opacity = nogamma(start.opacity, end.opacity);
-    return function(t) {
-      start.r = r(t);
-      start.g = g(t);
-      start.b = b(t);
-      start.opacity = opacity(t);
-      return start + "";
-    };
-  }
-
-  rgb$$1.gamma = rgbGamma;
-
-  return rgb$$1;
-})(1);
-
-var array$2 = function(a, b) {
-  var nb = b ? b.length : 0,
-      na = a ? Math.min(nb, a.length) : 0,
-      x = new Array(nb),
-      c = new Array(nb),
-      i;
-
-  for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);
-  for (; i < nb; ++i) c[i] = b[i];
-
-  return function(t) {
-    for (i = 0; i < na; ++i) c[i] = x[i](t);
-    return c;
-  };
-};
-
-var date = function(a, b) {
-  var d = new Date;
-  return a = +a, b -= a, function(t) {
-    return d.setTime(a + b * t), d;
-  };
-};
-
-var interpolateNumber = function(a, b) {
-  return a = +a, b -= a, function(t) {
-    return a + b * t;
-  };
-};
-
-var object = function(a, b) {
-  var i = {},
-      c = {},
-      k;
-
-  if (a === null || typeof a !== "object") a = {};
-  if (b === null || typeof b !== "object") b = {};
-
-  for (k in b) {
-    if (k in a) {
-      i[k] = interpolateValue(a[k], b[k]);
-    } else {
-      c[k] = b[k];
-    }
-  }
-
-  return function(t) {
-    for (k in i) c[k] = i[k](t);
-    return c;
-  };
-};
-
-var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
-var reB = new RegExp(reA.source, "g");
-
-function zero(b) {
-  return function() {
-    return b;
-  };
-}
-
-function one(b) {
-  return function(t) {
-    return b(t) + "";
-  };
-}
-
-var interpolateString = function(a, b) {
-  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
-      am, // current match in a
-      bm, // current match in b
-      bs, // string preceding current number in b, if any
-      i = -1, // index in s
-      s = [], // string constants and placeholders
-      q = []; // number interpolators
-
-  // Coerce inputs to strings.
-  a = a + "", b = b + "";
-
-  // Interpolate pairs of numbers in a & b.
-  while ((am = reA.exec(a))
-      && (bm = reB.exec(b))) {
-    if ((bs = bm.index) > bi) { // a string precedes the next number in b
-      bs = b.slice(bi, bs);
-      if (s[i]) s[i] += bs; // coalesce with previous string
-      else s[++i] = bs;
-    }
-    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
-      if (s[i]) s[i] += bm; // coalesce with previous string
-      else s[++i] = bm;
-    } else { // interpolate non-matching numbers
-      s[++i] = null;
-      q.push({i: i, x: interpolateNumber(am, bm)});
-    }
-    bi = reB.lastIndex;
-  }
-
-  // Add remains of b.
-  if (bi < b.length) {
-    bs = b.slice(bi);
-    if (s[i]) s[i] += bs; // coalesce with previous string
-    else s[++i] = bs;
-  }
-
-  // Special optimization for only a single match.
-  // Otherwise, interpolate each of the numbers and rejoin the string.
-  return s.length < 2 ? (q[0]
-      ? one(q[0].x)
-      : zero(b))
-      : (b = q.length, function(t) {
-          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
-          return s.join("");
-        });
-};
-
-var interpolateValue = function(a, b) {
-  var t = typeof b, c;
-  return b == null || t === "boolean" ? constant$3(b)
-      : (t === "number" ? interpolateNumber
-      : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
-      : b instanceof color ? interpolateRgb
-      : b instanceof Date ? date
-      : Array.isArray(b) ? array$2
-      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-      : interpolateNumber)(a, b);
-};
-
-var interpolateRound = function(a, b) {
-  return a = +a, b -= a, function(t) {
-    return Math.round(a + b * t);
-  };
-};
-
-var degrees = 180 / Math.PI;
-
-var identity$2 = {
-  translateX: 0,
-  translateY: 0,
-  rotate: 0,
-  skewX: 0,
-  scaleX: 1,
-  scaleY: 1
-};
-
-var decompose = function(a, b, c, d, e, f) {
-  var scaleX, scaleY, skewX;
-  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
-  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
-  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
-  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
-  return {
-    translateX: e,
-    translateY: f,
-    rotate: Math.atan2(b, a) * degrees,
-    skewX: Math.atan(skewX) * degrees,
-    scaleX: scaleX,
-    scaleY: scaleY
-  };
-};
-
-var cssNode;
-var cssRoot;
-var cssView;
-var svgNode;
-
-function parseCss(value) {
-  if (value === "none") return identity$2;
-  if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
-  cssNode.style.transform = value;
-  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
-  cssRoot.removeChild(cssNode);
-  value = value.slice(7, -1).split(",");
-  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
-}
-
-function parseSvg(value) {
-  if (value == null) return identity$2;
-  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
-  svgNode.setAttribute("transform", value);
-  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
-  value = value.matrix;
-  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
-}
-
-function interpolateTransform(parse, pxComma, pxParen, degParen) {
-
-  function pop(s) {
-    return s.length ? s.pop() + " " : "";
-  }
-
-  function translate(xa, ya, xb, yb, s, q) {
-    if (xa !== xb || ya !== yb) {
-      var i = s.push("translate(", null, pxComma, null, pxParen);
-      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
-    } else if (xb || yb) {
-      s.push("translate(" + xb + pxComma + yb + pxParen);
-    }
-  }
-
-  function rotate(a, b, s, q) {
-    if (a !== b) {
-      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
-      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b)});
-    } else if (b) {
-      s.push(pop(s) + "rotate(" + b + degParen);
-    }
-  }
-
-  function skewX(a, b, s, q) {
-    if (a !== b) {
-      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b)});
-    } else if (b) {
-      s.push(pop(s) + "skewX(" + b + degParen);
-    }
-  }
-
-  function scale(xa, ya, xb, yb, s, q) {
-    if (xa !== xb || ya !== yb) {
-      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
-    } else if (xb !== 1 || yb !== 1) {
-      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
-    }
-  }
-
-  return function(a, b) {
-    var s = [], // string constants and placeholders
-        q = []; // number interpolators
-    a = parse(a), b = parse(b);
-    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
-    rotate(a.rotate, b.rotate, s, q);
-    skewX(a.skewX, b.skewX, s, q);
-    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
-    a = b = null; // gc
-    return function(t) {
-      var i = -1, n = q.length, o;
-      while (++i < n) s[(o = q[i]).i] = o.x(t);
-      return s.join("");
-    };
-  };
-}
-
-var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
-
-var rho = Math.SQRT2;
-
-function cubehelix$1(hue$$1) {
-  return (function cubehelixGamma(y) {
-    y = +y;
-
-    function cubehelix$$1(start, end) {
-      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
-          s = nogamma(start.s, end.s),
-          l = nogamma(start.l, end.l),
-          opacity = nogamma(start.opacity, end.opacity);
-      return function(t) {
-        start.h = h(t);
-        start.s = s(t);
-        start.l = l(Math.pow(t, y));
-        start.opacity = opacity(t);
-        return start + "";
-      };
-    }
-
-    cubehelix$$1.gamma = cubehelixGamma;
-
-    return cubehelix$$1;
-  })(1);
-}
-
-cubehelix$1(hue);
-var cubehelixLong = cubehelix$1(nogamma);
-
-var constant$4 = function(x) {
-  return function() {
-    return x;
-  };
-};
-
-var number$1 = function(x) {
-  return +x;
-};
-
-var unit = [0, 1];
-
-function deinterpolateLinear(a, b) {
-  return (b -= (a = +a))
-      ? function(x) { return (x - a) / b; }
-      : constant$4(b);
-}
-
-function deinterpolateClamp(deinterpolate) {
-  return function(a, b) {
-    var d = deinterpolate(a = +a, b = +b);
-    return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
-  };
-}
-
-function reinterpolateClamp(reinterpolate) {
-  return function(a, b) {
-    var r = reinterpolate(a = +a, b = +b);
-    return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
-  };
-}
-
-function bimap(domain, range, deinterpolate, reinterpolate) {
-  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);
-  else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
-  return function(x) { return r0(d0(x)); };
-}
-
-function polymap(domain, range, deinterpolate, reinterpolate) {
-  var j = Math.min(domain.length, range.length) - 1,
-      d = new Array(j),
-      r = new Array(j),
-      i = -1;
-
-  // Reverse descending domains.
-  if (domain[j] < domain[0]) {
-    domain = domain.slice().reverse();
-    range = range.slice().reverse();
-  }
-
-  while (++i < j) {
-    d[i] = deinterpolate(domain[i], domain[i + 1]);
-    r[i] = reinterpolate(range[i], range[i + 1]);
-  }
-
-  return function(x) {
-    var i = bisectRight(domain, x, 1, j) - 1;
-    return r[i](d[i](x));
-  };
-}
-
-function copy(source, target) {
-  return target
-      .domain(source.domain())
-      .range(source.range())
-      .interpolate(source.interpolate())
-      .clamp(source.clamp());
-}
-
-// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
-function continuous(deinterpolate, reinterpolate) {
-  var domain = unit,
-      range = unit,
-      interpolate$$1 = interpolateValue,
-      clamp = false,
-      piecewise,
-      output,
-      input;
-
-  function rescale() {
-    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
-    output = input = null;
-    return scale;
-  }
-
-  function scale(x) {
-    return (output || (output = piecewise(domain, range, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
-  }
-
-  scale.invert = function(y) {
-    return (input || (input = piecewise(range, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
-  };
-
-  scale.domain = function(_) {
-    return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice();
-  };
-
-  scale.range = function(_) {
-    return arguments.length ? (range = slice$2.call(_), rescale()) : range.slice();
-  };
-
-  scale.rangeRound = function(_) {
-    return range = slice$2.call(_), interpolate$$1 = interpolateRound, rescale();
-  };
-
-  scale.clamp = function(_) {
-    return arguments.length ? (clamp = !!_, rescale()) : clamp;
-  };
-
-  scale.interpolate = function(_) {
-    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
-  };
-
-  return rescale();
-}
-
-// Computes the decimal coefficient and exponent of the specified number x with
-// significant digits p, where x is positive and p is in [1, 21] or undefined.
-// For example, formatDecimal(1.23) returns ["123", 0].
-var formatDecimal = function(x, p) {
-  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
-  var i, coefficient = x.slice(0, i);
-
-  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
-  return [
-    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
-    +x.slice(i + 1)
-  ];
-};
-
-var exponent = function(x) {
-  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
-};
-
-var formatGroup = function(grouping, thousands) {
-  return function(value, width) {
-    var i = value.length,
-        t = [],
-        j = 0,
-        g = grouping[0],
-        length = 0;
-
-    while (i > 0 && g > 0) {
-      if (length + g + 1 > width) g = Math.max(1, width - length);
-      t.push(value.substring(i -= g, i + g));
-      if ((length += g + 1) > width) break;
-      g = grouping[j = (j + 1) % grouping.length];
-    }
-
-    return t.reverse().join(thousands);
-  };
-};
-
-var formatNumerals = function(numerals) {
-  return function(value) {
-    return value.replace(/[0-9]/g, function(i) {
-      return numerals[+i];
-    });
-  };
-};
-
-var formatDefault = function(x, p) {
-  x = x.toPrecision(p);
-
-  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
-    switch (x[i]) {
-      case ".": i0 = i1 = i; break;
-      case "0": if (i0 === 0) i0 = i; i1 = i; break;
-      case "e": break out;
-      default: if (i0 > 0) i0 = 0; break;
-    }
-  }
-
-  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
-};
-
-var prefixExponent;
-
-var formatPrefixAuto = function(x, p) {
-  var d = formatDecimal(x, p);
-  if (!d) return x + "";
-  var coefficient = d[0],
-      exponent = d[1],
-      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-      n = coefficient.length;
-  return i === n ? coefficient
-      : i > n ? coefficient + new Array(i - n + 1).join("0")
-      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
-      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-};
-
-var formatRounded = function(x, p) {
-  var d = formatDecimal(x, p);
-  if (!d) return x + "";
-  var coefficient = d[0],
-      exponent = d[1];
-  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
-      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
-      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-};
-
-var formatTypes = {
-  "": formatDefault,
-  "%": function(x, p) { return (x * 100).toFixed(p); },
-  "b": function(x) { return Math.round(x).toString(2); },
-  "c": function(x) { return x + ""; },
-  "d": function(x) { return Math.round(x).toString(10); },
-  "e": function(x, p) { return x.toExponential(p); },
-  "f": function(x, p) { return x.toFixed(p); },
-  "g": function(x, p) { return x.toPrecision(p); },
-  "o": function(x) { return Math.round(x).toString(8); },
-  "p": function(x, p) { return formatRounded(x * 100, p); },
-  "r": formatRounded,
-  "s": formatPrefixAuto,
-  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
-  "x": function(x) { return Math.round(x).toString(16); }
-};
-
-// [[fill]align][sign][symbol][0][width][,][.precision][type]
-var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;
-
-function formatSpecifier(specifier) {
-  return new FormatSpecifier(specifier);
-}
-
-formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
-
-function FormatSpecifier(specifier) {
-  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
-
-  var match,
-      fill = match[1] || " ",
-      align = match[2] || ">",
-      sign = match[3] || "-",
-      symbol = match[4] || "",
-      zero = !!match[5],
-      width = match[6] && +match[6],
-      comma = !!match[7],
-      precision = match[8] && +match[8].slice(1),
-      type = match[9] || "";
-
-  // The "n" type is an alias for ",g".
-  if (type === "n") comma = true, type = "g";
-
-  // Map invalid types to the default format.
-  else if (!formatTypes[type]) type = "";
-
-  // If zero fill is specified, padding goes after sign and before digits.
-  if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
-
-  this.fill = fill;
-  this.align = align;
-  this.sign = sign;
-  this.symbol = symbol;
-  this.zero = zero;
-  this.width = width;
-  this.comma = comma;
-  this.precision = precision;
-  this.type = type;
-}
-
-FormatSpecifier.prototype.toString = function() {
-  return this.fill
-      + this.align
-      + this.sign
-      + this.symbol
-      + (this.zero ? "0" : "")
-      + (this.width == null ? "" : Math.max(1, this.width | 0))
-      + (this.comma ? "," : "")
-      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
-      + this.type;
-};
-
-var identity$3 = function(x) {
-  return x;
-};
-
-var prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
-
-var formatLocale = function(locale) {
-  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
-      currency = locale.currency,
-      decimal = locale.decimal,
-      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
-      percent = locale.percent || "%";
-
-  function newFormat(specifier) {
-    specifier = formatSpecifier(specifier);
-
-    var fill = specifier.fill,
-        align = specifier.align,
-        sign = specifier.sign,
-        symbol = specifier.symbol,
-        zero = specifier.zero,
-        width = specifier.width,
-        comma = specifier.comma,
-        precision = specifier.precision,
-        type = specifier.type;
-
-    // Compute the prefix and suffix.
-    // For SI-prefix, the suffix is lazily computed.
-    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
-
-    // What format function should we use?
-    // Is this an integer type?
-    // Can this type generate exponential notation?
-    var formatType = formatTypes[type],
-        maybeSuffix = !type || /[defgprs%]/.test(type);
-
-    // Set the default precision if not specified,
-    // or clamp the specified precision to the supported range.
-    // For significant precision, it must be in [1, 21].
-    // For fixed precision, it must be in [0, 20].
-    precision = precision == null ? (type ? 6 : 12)
-        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
-        : Math.max(0, Math.min(20, precision));
-
-    function format(value) {
-      var valuePrefix = prefix,
-          valueSuffix = suffix,
-          i, n, c;
-
-      if (type === "c") {
-        valueSuffix = formatType(value) + valueSuffix;
-        value = "";
-      } else {
-        value = +value;
-
-        // Perform the initial formatting.
-        var valueNegative = value < 0;
-        value = formatType(Math.abs(value), precision);
-
-        // If a negative value rounds to zero during formatting, treat as positive.
-        if (valueNegative && +value === 0) valueNegative = false;
-
-        // Compute the prefix and suffix.
-        valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-        valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");
-
-        // Break the formatted value into the integer “value” part that can be
-        // grouped, and fractional or exponential “suffix” part that is not.
-        if (maybeSuffix) {
-          i = -1, n = value.length;
-          while (++i < n) {
-            if (c = value.charCodeAt(i), 48 > c || c > 57) {
-              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-              value = value.slice(0, i);
-              break;
-            }
-          }
-        }
-      }
-
-      // If the fill character is not "0", grouping is applied before padding.
-      if (comma && !zero) value = group(value, Infinity);
-
-      // Compute the padding.
-      var length = valuePrefix.length + value.length + valueSuffix.length,
-          padding = length < width ? new Array(width - length + 1).join(fill) : "";
-
-      // If the fill character is "0", grouping is applied after padding.
-      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";
-
-      // Reconstruct the final output based on the desired alignment.
-      switch (align) {
-        case "<": value = valuePrefix + value + valueSuffix + padding; break;
-        case "=": value = valuePrefix + padding + value + valueSuffix; break;
-        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
-        default: value = padding + valuePrefix + value + valueSuffix; break;
-      }
-
-      return numerals(value);
-    }
-
-    format.toString = function() {
-      return specifier + "";
-    };
-
-    return format;
-  }
-
-  function formatPrefix(specifier, value) {
-    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-        k = Math.pow(10, -e),
-        prefix = prefixes[8 + e / 3];
-    return function(value) {
-      return f(k * value) + prefix;
-    };
-  }
-
-  return {
-    format: newFormat,
-    formatPrefix: formatPrefix
-  };
-};
-
-var locale;
-
-var formatPrefix;
-
-defaultLocale({
-  decimal: ".",
-  thousands: ",",
-  grouping: [3],
-  currency: ["$", ""]
-});
-
-function defaultLocale(definition) {
-  locale = formatLocale(definition);
-  exports.format = locale.format;
-  formatPrefix = locale.formatPrefix;
-  return locale;
-}
-
-var precisionFixed = function(step) {
-  return Math.max(0, -exponent(Math.abs(step)));
-};
-
-var precisionPrefix = function(step, value) {
-  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-};
-
-var precisionRound = function(step, max) {
-  step = Math.abs(step), max = Math.abs(max) - step;
-  return Math.max(0, exponent(max) - exponent(step)) + 1;
-};
-
-var tickFormat = function(domain, count, specifier) {
-  var start = domain[0],
-      stop = domain[domain.length - 1],
-      step = tickStep(start, stop, count == null ? 10 : count),
-      precision;
-  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
-  switch (specifier.type) {
-    case "s": {
-      var value = Math.max(Math.abs(start), Math.abs(stop));
-      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
-      return formatPrefix(specifier, value);
-    }
-    case "":
-    case "e":
-    case "g":
-    case "p":
-    case "r": {
-      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
-      break;
-    }
-    case "f":
-    case "%": {
-      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
-      break;
-    }
-  }
-  return exports.format(specifier);
-};
-
-function linearish(scale) {
-  var domain = scale.domain;
-
-  scale.ticks = function(count) {
-    var d = domain();
-    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-  };
-
-  scale.tickFormat = function(count, specifier) {
-    return tickFormat(domain(), count, specifier);
-  };
-
-  scale.nice = function(count) {
-    if (count == null) count = 10;
-
-    var d = domain(),
-        i0 = 0,
-        i1 = d.length - 1,
-        start = d[i0],
-        stop = d[i1],
-        step;
-
-    if (stop < start) {
-      step = start, start = stop, stop = step;
-      step = i0, i0 = i1, i1 = step;
-    }
-
-    step = tickIncrement(start, stop, count);
-
-    if (step > 0) {
-      start = Math.floor(start / step) * step;
-      stop = Math.ceil(stop / step) * step;
-      step = tickIncrement(start, stop, count);
-    } else if (step < 0) {
-      start = Math.ceil(start * step) / step;
-      stop = Math.floor(stop * step) / step;
-      step = tickIncrement(start, stop, count);
-    }
-
-    if (step > 0) {
-      d[i0] = Math.floor(start / step) * step;
-      d[i1] = Math.ceil(stop / step) * step;
-      domain(d);
-    } else if (step < 0) {
-      d[i0] = Math.ceil(start * step) / step;
-      d[i1] = Math.floor(stop * step) / step;
-      domain(d);
-    }
-
-    return scale;
-  };
-
-  return scale;
-}
-
-function linear() {
-  var scale = continuous(deinterpolateLinear, interpolateNumber);
-
-  scale.copy = function() {
-    return copy(scale, linear());
-  };
-
-  return linearish(scale);
-}
-
-var t0$1 = new Date;
-var t1$1 = new Date;
-
-function newInterval(floori, offseti, count, field) {
-
-  function interval(date) {
-    return floori(date = new Date(+date)), date;
-  }
-
-  interval.floor = interval;
-
-  interval.ceil = function(date) {
-    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
-  };
-
-  interval.round = function(date) {
-    var d0 = interval(date),
-        d1 = interval.ceil(date);
-    return date - d0 < d1 - date ? d0 : d1;
-  };
-
-  interval.offset = function(date, step) {
-    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
-  };
-
-  interval.range = function(start, stop, step) {
-    var range = [];
-    start = interval.ceil(start);
-    step = step == null ? 1 : Math.floor(step);
-    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
-    do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)
-    return range;
-  };
-
-  interval.filter = function(test) {
-    return newInterval(function(date) {
-      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
-    }, function(date, step) {
-      if (date >= date) {
-        if (step < 0) while (++step <= 0) {
-          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
-        } else while (--step >= 0) {
-          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
-        }
-      }
-    });
-  };
-
-  if (count) {
-    interval.count = function(start, end) {
-      t0$1.setTime(+start), t1$1.setTime(+end);
-      floori(t0$1), floori(t1$1);
-      return Math.floor(count(t0$1, t1$1));
-    };
-
-    interval.every = function(step) {
-      step = Math.floor(step);
-      return !isFinite(step) || !(step > 0) ? null
-          : !(step > 1) ? interval
-          : interval.filter(field
-              ? function(d) { return field(d) % step === 0; }
-              : function(d) { return interval.count(0, d) % step === 0; });
-    };
-  }
-
-  return interval;
-}
-
-var millisecond = newInterval(function() {
-  // noop
-}, function(date, step) {
-  date.setTime(+date + step);
-}, function(start, end) {
-  return end - start;
-});
-
-// An optimized implementation for this simple case.
-millisecond.every = function(k) {
-  k = Math.floor(k);
-  if (!isFinite(k) || !(k > 0)) return null;
-  if (!(k > 1)) return millisecond;
-  return newInterval(function(date) {
-    date.setTime(Math.floor(date / k) * k);
-  }, function(date, step) {
-    date.setTime(+date + step * k);
-  }, function(start, end) {
-    return (end - start) / k;
-  });
-};
-
-var durationSecond$1 = 1e3;
-var durationMinute$1 = 6e4;
-var durationHour$1 = 36e5;
-var durationDay$1 = 864e5;
-var durationWeek$1 = 6048e5;
-
-var second = newInterval(function(date) {
-  date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);
-}, function(date, step) {
-  date.setTime(+date + step * durationSecond$1);
-}, function(start, end) {
-  return (end - start) / durationSecond$1;
-}, function(date) {
-  return date.getUTCSeconds();
-});
-
-var minute = newInterval(function(date) {
-  date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);
-}, function(date, step) {
-  date.setTime(+date + step * durationMinute$1);
-}, function(start, end) {
-  return (end - start) / durationMinute$1;
-}, function(date) {
-  return date.getMinutes();
-});
-
-var hour = newInterval(function(date) {
-  var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;
-  if (offset < 0) offset += durationHour$1;
-  date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);
-}, function(date, step) {
-  date.setTime(+date + step * durationHour$1);
-}, function(start, end) {
-  return (end - start) / durationHour$1;
-}, function(date) {
-  return date.getHours();
-});
-
-var day = newInterval(function(date) {
-  date.setHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setDate(date.getDate() + step);
-}, function(start, end) {
-  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;
-}, function(date) {
-  return date.getDate() - 1;
-});
-
-function weekday(i) {
-  return newInterval(function(date) {
-    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
-    date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
-    date.setDate(date.getDate() + step * 7);
-  }, function(start, end) {
-    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;
-  });
-}
-
-var sunday = weekday(0);
-var monday = weekday(1);
-var tuesday = weekday(2);
-var wednesday = weekday(3);
-var thursday = weekday(4);
-var friday = weekday(5);
-var saturday = weekday(6);
-
-var month = newInterval(function(date) {
-  date.setDate(1);
-  date.setHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setMonth(date.getMonth() + step);
-}, function(start, end) {
-  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
-}, function(date) {
-  return date.getMonth();
-});
-
-var year = newInterval(function(date) {
-  date.setMonth(0, 1);
-  date.setHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setFullYear(date.getFullYear() + step);
-}, function(start, end) {
-  return end.getFullYear() - start.getFullYear();
-}, function(date) {
-  return date.getFullYear();
-});
-
-// An optimized implementation for this simple case.
-year.every = function(k) {
-  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
-    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
-    date.setMonth(0, 1);
-    date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
-    date.setFullYear(date.getFullYear() + step * k);
-  });
-};
-
-var utcMinute = newInterval(function(date) {
-  date.setUTCSeconds(0, 0);
-}, function(date, step) {
-  date.setTime(+date + step * durationMinute$1);
-}, function(start, end) {
-  return (end - start) / durationMinute$1;
-}, function(date) {
-  return date.getUTCMinutes();
-});
-
-var utcHour = newInterval(function(date) {
-  date.setUTCMinutes(0, 0, 0);
-}, function(date, step) {
-  date.setTime(+date + step * durationHour$1);
-}, function(start, end) {
-  return (end - start) / durationHour$1;
-}, function(date) {
-  return date.getUTCHours();
-});
-
-var utcDay = newInterval(function(date) {
-  date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setUTCDate(date.getUTCDate() + step);
-}, function(start, end) {
-  return (end - start) / durationDay$1;
-}, function(date) {
-  return date.getUTCDate() - 1;
-});
-
-function utcWeekday(i) {
-  return newInterval(function(date) {
-    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
-    date.setUTCHours(0, 0, 0, 0);
-  }, function(date, step) {
-    date.setUTCDate(date.getUTCDate() + step * 7);
-  }, function(start, end) {
-    return (end - start) / durationWeek$1;
-  });
-}
-
-var utcSunday = utcWeekday(0);
-var utcMonday = utcWeekday(1);
-var utcTuesday = utcWeekday(2);
-var utcWednesday = utcWeekday(3);
-var utcThursday = utcWeekday(4);
-var utcFriday = utcWeekday(5);
-var utcSaturday = utcWeekday(6);
-
-var utcMonth = newInterval(function(date) {
-  date.setUTCDate(1);
-  date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setUTCMonth(date.getUTCMonth() + step);
-}, function(start, end) {
-  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
-}, function(date) {
-  return date.getUTCMonth();
-});
-
-var utcYear = newInterval(function(date) {
-  date.setUTCMonth(0, 1);
-  date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setUTCFullYear(date.getUTCFullYear() + step);
-}, function(start, end) {
-  return end.getUTCFullYear() - start.getUTCFullYear();
-}, function(date) {
-  return date.getUTCFullYear();
-});
-
-// An optimized implementation for this simple case.
-utcYear.every = function(k) {
-  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
-    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
-    date.setUTCMonth(0, 1);
-    date.setUTCHours(0, 0, 0, 0);
-  }, function(date, step) {
-    date.setUTCFullYear(date.getUTCFullYear() + step * k);
-  });
-};
-
-function localDate(d) {
-  if (0 <= d.y && d.y < 100) {
-    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
-    date.setFullYear(d.y);
-    return date;
-  }
-  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
-}
-
-function utcDate(d) {
-  if (0 <= d.y && d.y < 100) {
-    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
-    date.setUTCFullYear(d.y);
-    return date;
-  }
-  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
-}
-
-function newYear(y) {
-  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
-}
-
-function formatLocale$1(locale) {
-  var locale_dateTime = locale.dateTime,
-      locale_date = locale.date,
-      locale_time = locale.time,
-      locale_periods = locale.periods,
-      locale_weekdays = locale.days,
-      locale_shortWeekdays = locale.shortDays,
-      locale_months = locale.months,
-      locale_shortMonths = locale.shortMonths;
-
-  var periodRe = formatRe(locale_periods),
-      periodLookup = formatLookup(locale_periods),
-      weekdayRe = formatRe(locale_weekdays),
-      weekdayLookup = formatLookup(locale_weekdays),
-      shortWeekdayRe = formatRe(locale_shortWeekdays),
-      shortWeekdayLookup = formatLookup(locale_shortWeekdays),
-      monthRe = formatRe(locale_months),
-      monthLookup = formatLookup(locale_months),
-      shortMonthRe = formatRe(locale_shortMonths),
-      shortMonthLookup = formatLookup(locale_shortMonths);
-
-  var formats = {
-    "a": formatShortWeekday,
-    "A": formatWeekday,
-    "b": formatShortMonth,
-    "B": formatMonth,
-    "c": null,
-    "d": formatDayOfMonth,
-    "e": formatDayOfMonth,
-    "f": formatMicroseconds,
-    "H": formatHour24,
-    "I": formatHour12,
-    "j": formatDayOfYear,
-    "L": formatMilliseconds,
-    "m": formatMonthNumber,
-    "M": formatMinutes,
-    "p": formatPeriod,
-    "Q": formatUnixTimestamp,
-    "s": formatUnixTimestampSeconds,
-    "S": formatSeconds,
-    "u": formatWeekdayNumberMonday,
-    "U": formatWeekNumberSunday,
-    "V": formatWeekNumberISO,
-    "w": formatWeekdayNumberSunday,
-    "W": formatWeekNumberMonday,
-    "x": null,
-    "X": null,
-    "y": formatYear,
-    "Y": formatFullYear,
-    "Z": formatZone,
-    "%": formatLiteralPercent
-  };
-
-  var utcFormats = {
-    "a": formatUTCShortWeekday,
-    "A": formatUTCWeekday,
-    "b": formatUTCShortMonth,
-    "B": formatUTCMonth,
-    "c": null,
-    "d": formatUTCDayOfMonth,
-    "e": formatUTCDayOfMonth,
-    "f": formatUTCMicroseconds,
-    "H": formatUTCHour24,
-    "I": formatUTCHour12,
-    "j": formatUTCDayOfYear,
-    "L": formatUTCMilliseconds,
-    "m": formatUTCMonthNumber,
-    "M": formatUTCMinutes,
-    "p": formatUTCPeriod,
-    "Q": formatUnixTimestamp,
-    "s": formatUnixTimestampSeconds,
-    "S": formatUTCSeconds,
-    "u": formatUTCWeekdayNumberMonday,
-    "U": formatUTCWeekNumberSunday,
-    "V": formatUTCWeekNumberISO,
-    "w": formatUTCWeekdayNumberSunday,
-    "W": formatUTCWeekNumberMonday,
-    "x": null,
-    "X": null,
-    "y": formatUTCYear,
-    "Y": formatUTCFullYear,
-    "Z": formatUTCZone,
-    "%": formatLiteralPercent
-  };
-
-  var parses = {
-    "a": parseShortWeekday,
-    "A": parseWeekday,
-    "b": parseShortMonth,
-    "B": parseMonth,
-    "c": parseLocaleDateTime,
-    "d": parseDayOfMonth,
-    "e": parseDayOfMonth,
-    "f": parseMicroseconds,
-    "H": parseHour24,
-    "I": parseHour24,
-    "j": parseDayOfYear,
-    "L": parseMilliseconds,
-    "m": parseMonthNumber,
-    "M": parseMinutes,
-    "p": parsePeriod,
-    "Q": parseUnixTimestamp,
-    "s": parseUnixTimestampSeconds,
-    "S": parseSeconds,
-    "u": parseWeekdayNumberMonday,
-    "U": parseWeekNumberSunday,
-    "V": parseWeekNumberISO,
-    "w": parseWeekdayNumberSunday,
-    "W": parseWeekNumberMonday,
-    "x": parseLocaleDate,
-    "X": parseLocaleTime,
-    "y": parseYear,
-    "Y": parseFullYear,
-    "Z": parseZone,
-    "%": parseLiteralPercent
-  };
-
-  // These recursive directive definitions must be deferred.
-  formats.x = newFormat(locale_date, formats);
-  formats.X = newFormat(locale_time, formats);
-  formats.c = newFormat(locale_dateTime, formats);
-  utcFormats.x = newFormat(locale_date, utcFormats);
-  utcFormats.X = newFormat(locale_time, utcFormats);
-  utcFormats.c = newFormat(locale_dateTime, utcFormats);
-
-  function newFormat(specifier, formats) {
-    return function(date) {
-      var string = [],
-          i = -1,
-          j = 0,
-          n = specifier.length,
-          c,
-          pad,
-          format;
-
-      if (!(date instanceof Date)) date = new Date(+date);
-
-      while (++i < n) {
-        if (specifier.charCodeAt(i) === 37) {
-          string.push(specifier.slice(j, i));
-          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
-          else pad = c === "e" ? " " : "0";
-          if (format = formats[c]) c = format(date, pad);
-          string.push(c);
-          j = i + 1;
-        }
-      }
-
-      string.push(specifier.slice(j, i));
-      return string.join("");
-    };
-  }
-
-  function newParse(specifier, newDate) {
-    return function(string) {
-      var d = newYear(1900),
-          i = parseSpecifier(d, specifier, string += "", 0),
-          week, day$$1;
-      if (i != string.length) return null;
-
-      // If a UNIX timestamp is specified, return it.
-      if ("Q" in d) return new Date(d.Q);
-
-      // The am-pm flag is 0 for AM, and 1 for PM.
-      if ("p" in d) d.H = d.H % 12 + d.p * 12;
-
-      // Convert day-of-week and week-of-year to day-of-year.
-      if ("V" in d) {
-        if (d.V < 1 || d.V > 53) return null;
-        if (!("w" in d)) d.w = 1;
-        if ("Z" in d) {
-          week = utcDate(newYear(d.y)), day$$1 = week.getUTCDay();
-          week = day$$1 > 4 || day$$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
-          week = utcDay.offset(week, (d.V - 1) * 7);
-          d.y = week.getUTCFullYear();
-          d.m = week.getUTCMonth();
-          d.d = week.getUTCDate() + (d.w + 6) % 7;
-        } else {
-          week = newDate(newYear(d.y)), day$$1 = week.getDay();
-          week = day$$1 > 4 || day$$1 === 0 ? monday.ceil(week) : monday(week);
-          week = day.offset(week, (d.V - 1) * 7);
-          d.y = week.getFullYear();
-          d.m = week.getMonth();
-          d.d = week.getDate() + (d.w + 6) % 7;
-        }
-      } else if ("W" in d || "U" in d) {
-        if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
-        day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
-        d.m = 0;
-        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
-      }
-
-      // If a time zone is specified, all fields are interpreted as UTC and then
-      // offset according to the specified time zone.
-      if ("Z" in d) {
-        d.H += d.Z / 100 | 0;
-        d.M += d.Z % 100;
-        return utcDate(d);
-      }
-
-      // Otherwise, all fields are in local time.
-      return newDate(d);
-    };
-  }
-
-  function parseSpecifier(d, specifier, string, j) {
-    var i = 0,
-        n = specifier.length,
-        m = string.length,
-        c,
-        parse;
-
-    while (i < n) {
-      if (j >= m) return -1;
-      c = specifier.charCodeAt(i++);
-      if (c === 37) {
-        c = specifier.charAt(i++);
-        parse = parses[c in pads ? specifier.charAt(i++) : c];
-        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
-      } else if (c != string.charCodeAt(j++)) {
-        return -1;
-      }
-    }
-
-    return j;
-  }
-
-  function parsePeriod(d, string, i) {
-    var n = periodRe.exec(string.slice(i));
-    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
-  }
-
-  function parseShortWeekday(d, string, i) {
-    var n = shortWeekdayRe.exec(string.slice(i));
-    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
-  }
-
-  function parseWeekday(d, string, i) {
-    var n = weekdayRe.exec(string.slice(i));
-    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
-  }
-
-  function parseShortMonth(d, string, i) {
-    var n = shortMonthRe.exec(string.slice(i));
-    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
-  }
-
-  function parseMonth(d, string, i) {
-    var n = monthRe.exec(string.slice(i));
-    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
-  }
-
-  function parseLocaleDateTime(d, string, i) {
-    return parseSpecifier(d, locale_dateTime, string, i);
-  }
-
-  function parseLocaleDate(d, string, i) {
-    return parseSpecifier(d, locale_date, string, i);
-  }
-
-  function parseLocaleTime(d, string, i) {
-    return parseSpecifier(d, locale_time, string, i);
-  }
-
-  function formatShortWeekday(d) {
-    return locale_shortWeekdays[d.getDay()];
-  }
-
-  function formatWeekday(d) {
-    return locale_weekdays[d.getDay()];
-  }
-
-  function formatShortMonth(d) {
-    return locale_shortMonths[d.getMonth()];
-  }
-
-  function formatMonth(d) {
-    return locale_months[d.getMonth()];
-  }
-
-  function formatPeriod(d) {
-    return locale_periods[+(d.getHours() >= 12)];
-  }
-
-  function formatUTCShortWeekday(d) {
-    return locale_shortWeekdays[d.getUTCDay()];
-  }
-
-  function formatUTCWeekday(d) {
-    return locale_weekdays[d.getUTCDay()];
-  }
-
-  function formatUTCShortMonth(d) {
-    return locale_shortMonths[d.getUTCMonth()];
-  }
-
-  function formatUTCMonth(d) {
-    return locale_months[d.getUTCMonth()];
-  }
-
-  function formatUTCPeriod(d) {
-    return locale_periods[+(d.getUTCHours() >= 12)];
-  }
-
-  return {
-    format: function(specifier) {
-      var f = newFormat(specifier += "", formats);
-      f.toString = function() { return specifier; };
-      return f;
-    },
-    parse: function(specifier) {
-      var p = newParse(specifier += "", localDate);
-      p.toString = function() { return specifier; };
-      return p;
-    },
-    utcFormat: function(specifier) {
-      var f = newFormat(specifier += "", utcFormats);
-      f.toString = function() { return specifier; };
-      return f;
-    },
-    utcParse: function(specifier) {
-      var p = newParse(specifier, utcDate);
-      p.toString = function() { return specifier; };
-      return p;
-    }
-  };
-}
-
-var pads = {"-": "", "_": " ", "0": "0"};
-var numberRe = /^\s*\d+/;
-var percentRe = /^%/;
-var requoteRe = /[\\^$*+?|[\]().{}]/g;
-
-function pad(value, fill, width) {
-  var sign = value < 0 ? "-" : "",
-      string = (sign ? -value : value) + "",
-      length = string.length;
-  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
-}
-
-function requote(s) {
-  return s.replace(requoteRe, "\\$&");
-}
-
-function formatRe(names) {
-  return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
-}
-
-function formatLookup(names) {
-  var map = {}, i = -1, n = names.length;
-  while (++i < n) map[names[i].toLowerCase()] = i;
-  return map;
-}
-
-function parseWeekdayNumberSunday(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 1));
-  return n ? (d.w = +n[0], i + n[0].length) : -1;
-}
-
-function parseWeekdayNumberMonday(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 1));
-  return n ? (d.u = +n[0], i + n[0].length) : -1;
-}
-
-function parseWeekNumberSunday(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.U = +n[0], i + n[0].length) : -1;
-}
-
-function parseWeekNumberISO(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.V = +n[0], i + n[0].length) : -1;
-}
-
-function parseWeekNumberMonday(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.W = +n[0], i + n[0].length) : -1;
-}
-
-function parseFullYear(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 4));
-  return n ? (d.y = +n[0], i + n[0].length) : -1;
-}
-
-function parseYear(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
-}
-
-function parseZone(d, string, i) {
-  var n = /^(Z)|([+-]\d\d)(?::?(\d\d))?/.exec(string.slice(i, i + 6));
-  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
-}
-
-function parseMonthNumber(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
-}
-
-function parseDayOfMonth(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.d = +n[0], i + n[0].length) : -1;
-}
-
-function parseDayOfYear(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 3));
-  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
-}
-
-function parseHour24(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.H = +n[0], i + n[0].length) : -1;
-}
-
-function parseMinutes(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.M = +n[0], i + n[0].length) : -1;
-}
-
-function parseSeconds(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 2));
-  return n ? (d.S = +n[0], i + n[0].length) : -1;
-}
-
-function parseMilliseconds(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 3));
-  return n ? (d.L = +n[0], i + n[0].length) : -1;
-}
-
-function parseMicroseconds(d, string, i) {
-  var n = numberRe.exec(string.slice(i, i + 6));
-  return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;
-}
-
-function parseLiteralPercent(d, string, i) {
-  var n = percentRe.exec(string.slice(i, i + 1));
-  return n ? i + n[0].length : -1;
-}
-
-function parseUnixTimestamp(d, string, i) {
-  var n = numberRe.exec(string.slice(i));
-  return n ? (d.Q = +n[0], i + n[0].length) : -1;
-}
-
-function parseUnixTimestampSeconds(d, string, i) {
-  var n = numberRe.exec(string.slice(i));
-  return n ? (d.Q = (+n[0]) * 1000, i + n[0].length) : -1;
-}
-
-function formatDayOfMonth(d, p) {
-  return pad(d.getDate(), p, 2);
-}
-
-function formatHour24(d, p) {
-  return pad(d.getHours(), p, 2);
-}
-
-function formatHour12(d, p) {
-  return pad(d.getHours() % 12 || 12, p, 2);
-}
-
-function formatDayOfYear(d, p) {
-  return pad(1 + day.count(year(d), d), p, 3);
-}
-
-function formatMilliseconds(d, p) {
-  return pad(d.getMilliseconds(), p, 3);
-}
-
-function formatMicroseconds(d, p) {
-  return formatMilliseconds(d, p) + "000";
-}
-
-function formatMonthNumber(d, p) {
-  return pad(d.getMonth() + 1, p, 2);
-}
-
-function formatMinutes(d, p) {
-  return pad(d.getMinutes(), p, 2);
-}
-
-function formatSeconds(d, p) {
-  return pad(d.getSeconds(), p, 2);
-}
-
-function formatWeekdayNumberMonday(d) {
-  var day$$1 = d.getDay();
-  return day$$1 === 0 ? 7 : day$$1;
-}
-
-function formatWeekNumberSunday(d, p) {
-  return pad(sunday.count(year(d), d), p, 2);
-}
-
-function formatWeekNumberISO(d, p) {
-  var day$$1 = d.getDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? thursday(d) : thursday.ceil(d);
-  return pad(thursday.count(year(d), d) + (year(d).getDay() === 4), p, 2);
-}
-
-function formatWeekdayNumberSunday(d) {
-  return d.getDay();
-}
-
-function formatWeekNumberMonday(d, p) {
-  return pad(monday.count(year(d), d), p, 2);
-}
-
-function formatYear(d, p) {
-  return pad(d.getFullYear() % 100, p, 2);
-}
-
-function formatFullYear(d, p) {
-  return pad(d.getFullYear() % 10000, p, 4);
-}
-
-function formatZone(d) {
-  var z = d.getTimezoneOffset();
-  return (z > 0 ? "-" : (z *= -1, "+"))
-      + pad(z / 60 | 0, "0", 2)
-      + pad(z % 60, "0", 2);
-}
-
-function formatUTCDayOfMonth(d, p) {
-  return pad(d.getUTCDate(), p, 2);
-}
-
-function formatUTCHour24(d, p) {
-  return pad(d.getUTCHours(), p, 2);
-}
-
-function formatUTCHour12(d, p) {
-  return pad(d.getUTCHours() % 12 || 12, p, 2);
-}
-
-function formatUTCDayOfYear(d, p) {
-  return pad(1 + utcDay.count(utcYear(d), d), p, 3);
-}
-
-function formatUTCMilliseconds(d, p) {
-  return pad(d.getUTCMilliseconds(), p, 3);
-}
-
-function formatUTCMicroseconds(d, p) {
-  return formatUTCMilliseconds(d, p) + "000";
-}
-
-function formatUTCMonthNumber(d, p) {
-  return pad(d.getUTCMonth() + 1, p, 2);
-}
-
-function formatUTCMinutes(d, p) {
-  return pad(d.getUTCMinutes(), p, 2);
-}
-
-function formatUTCSeconds(d, p) {
-  return pad(d.getUTCSeconds(), p, 2);
-}
-
-function formatUTCWeekdayNumberMonday(d) {
-  var dow = d.getUTCDay();
-  return dow === 0 ? 7 : dow;
-}
-
-function formatUTCWeekNumberSunday(d, p) {
-  return pad(utcSunday.count(utcYear(d), d), p, 2);
-}
-
-function formatUTCWeekNumberISO(d, p) {
-  var day$$1 = d.getUTCDay();
-  d = (day$$1 >= 4 || day$$1 === 0) ? utcThursday(d) : utcThursday.ceil(d);
-  return pad(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);
-}
-
-function formatUTCWeekdayNumberSunday(d) {
-  return d.getUTCDay();
-}
-
-function formatUTCWeekNumberMonday(d, p) {
-  return pad(utcMonday.count(utcYear(d), d), p, 2);
-}
-
-function formatUTCYear(d, p) {
-  return pad(d.getUTCFullYear() % 100, p, 2);
-}
-
-function formatUTCFullYear(d, p) {
-  return pad(d.getUTCFullYear() % 10000, p, 4);
-}
-
-function formatUTCZone() {
-  return "+0000";
-}
-
-function formatLiteralPercent() {
-  return "%";
-}
-
-function formatUnixTimestamp(d) {
-  return +d;
-}
-
-function formatUnixTimestampSeconds(d) {
-  return Math.floor(+d / 1000);
-}
-
-var locale$1;
-var timeFormat;
-var timeParse;
-var utcFormat;
-var utcParse;
-
-defaultLocale$1({
-  dateTime: "%x, %X",
-  date: "%-m/%-d/%Y",
-  time: "%-I:%M:%S %p",
-  periods: ["AM", "PM"],
-  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
-  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
-  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
-  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
-});
-
-function defaultLocale$1(definition) {
-  locale$1 = formatLocale$1(definition);
-  timeFormat = locale$1.format;
-  timeParse = locale$1.parse;
-  utcFormat = locale$1.utcFormat;
-  utcParse = locale$1.utcParse;
-  return locale$1;
-}
-
-var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";
-
-function formatIsoNative(date) {
-  return date.toISOString();
-}
-
-var formatIso = Date.prototype.toISOString
-    ? formatIsoNative
-    : utcFormat(isoSpecifier);
-
-function parseIsoNative(string) {
-  var date = new Date(string);
-  return isNaN(date) ? null : date;
-}
-
-var parseIso = +new Date("2000-01-01T00:00:00.000Z")
-    ? parseIsoNative
-    : utcParse(isoSpecifier);
-
-var colors = function(s) {
-  return s.match(/.{6}/g).map(function(x) {
-    return "#" + x;
-  });
-};
-
-colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
-
-colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");
-
-colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");
-
-colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");
-
-cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
-
-var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
-
-var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
-
-var rainbow = cubehelix();
-
-function ramp(range) {
-  var n = range.length;
-  return function(t) {
-    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
-  };
-}
-
-ramp(colors("44015444025645045745055946075a46085c460a5d460b5e470d60470e6147106347116447136548146748166848176948186a481a6c481b6d481c6e481d6f481f70482071482173482374482475482576482677482878482979472a7a472c7a472d7b472e7c472f7d46307e46327e46337f463480453581453781453882443983443a83443b84433d84433e85423f854240864241864142874144874045884046883f47883f48893e49893e4a893e4c8a3d4d8a3d4e8a3c4f8a3c508b3b518b3b528b3a538b3a548c39558c39568c38588c38598c375a8c375b8d365c8d365d8d355e8d355f8d34608d34618d33628d33638d32648e32658e31668e31678e31688e30698e306a8e2f6b8e2f6c8e2e6d8e2e6e8e2e6f8e2d708e2d718e2c718e2c728e2c738e2b748e2b758e2a768e2a778e2a788e29798e297a8e297b8e287c8e287d8e277e8e277f8e27808e26818e26828e26828e25838e25848e25858e24868e24878e23888e23898e238a8d228b8d228c8d228d8d218e8d218f8d21908d21918c20928c20928c20938c1f948c1f958b1f968b1f978b1f988b1f998a1f9a8a1e9b8a1e9c891e9d891f9e891f9f881fa0881fa1881fa1871fa28720a38620a48621a58521a68522a78522a88423a98324aa8325ab8225ac8226ad8127ad8128ae8029af7f2ab07f2cb17e2db27d2eb37c2fb47c31b57b32b67a34b67935b77937b87838b9773aba763bbb753dbc743fbc7340bd7242be7144bf7046c06f48c16e4ac16d4cc26c4ec36b50c46a52c56954c56856c66758c7655ac8645cc8635ec96260ca6063cb5f65cb5e67cc5c69cd5b6ccd5a6ece5870cf5773d05675d05477d1537ad1517cd2507fd34e81d34d84d44b86d54989d5488bd6468ed64590d74393d74195d84098d83e9bd93c9dd93ba0da39a2da37a5db36a8db34aadc32addc30b0dd2fb2dd2db5de2bb8de29bade28bddf26c0df25c2df23c5e021c8e020cae11fcde11dd0e11cd2e21bd5e21ad8e219dae319dde318dfe318e2e418e5e419e7e419eae51aece51befe51cf1e51df4e61ef6e620f8e621fbe723fde725"));
-
-var magma = ramp(colors("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"));
-
-var inferno = ramp(colors("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"));
-
-var plasma = ramp(colors("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"));
-
-function cubicInOut(t) {
-  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-}
-
-var pi = Math.PI;
-
-var tau = 2 * Math.PI;
-
-var noop = {value: function() {}};
-
-function dispatch() {
-  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-    if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
-    _[t] = [];
-  }
-  return new Dispatch(_);
-}
-
-function Dispatch(_) {
-  this._ = _;
-}
-
-function parseTypenames$1(typenames, types) {
-  return typenames.trim().split(/^|\s+/).map(function(t) {
-    var name = "", i = t.indexOf(".");
-    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
-    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
-    return {type: t, name: name};
-  });
-}
-
-Dispatch.prototype = dispatch.prototype = {
-  constructor: Dispatch,
-  on: function(typename, callback) {
-    var _ = this._,
-        T = parseTypenames$1(typename + "", _),
-        t,
-        i = -1,
-        n = T.length;
-
-    // If no callback was specified, return the callback of the given type and name.
-    if (arguments.length < 2) {
-      while (++i < n) if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) return t;
-      return;
-    }
-
-    // If a type was specified, set the callback for the given type and name.
-    // Otherwise, if a null callback was specified, remove callbacks of the given name.
-    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
-    while (++i < n) {
-      if (t = (typename = T[i]).type) _[t] = set$3(_[t], typename.name, callback);
-      else if (callback == null) for (t in _) _[t] = set$3(_[t], typename.name, null);
-    }
-
-    return this;
-  },
-  copy: function() {
-    var copy = {}, _ = this._;
-    for (var t in _) copy[t] = _[t].slice();
-    return new Dispatch(copy);
-  },
-  call: function(type, that) {
-    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
-    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
-    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
-  },
-  apply: function(type, that, args) {
-    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
-    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
-  }
-};
-
-function get$1(type, name) {
-  for (var i = 0, n = type.length, c; i < n; ++i) {
-    if ((c = type[i]).name === name) {
-      return c.value;
-    }
-  }
-}
-
-function set$3(type, name, callback) {
-  for (var i = 0, n = type.length; i < n; ++i) {
-    if (type[i].name === name) {
-      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
-      break;
-    }
-  }
-  if (callback != null) type.push({name: name, value: callback});
-  return type;
-}
-
-var frame = 0;
-var timeout = 0;
-var interval = 0;
-var pokeDelay = 1000;
-var taskHead;
-var taskTail;
-var clockLast = 0;
-var clockNow = 0;
-var clockSkew = 0;
-var clock = typeof performance === "object" && performance.now ? performance : Date;
-var setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
-
-function now() {
-  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
-}
-
-function clearNow() {
-  clockNow = 0;
-}
-
-function Timer() {
-  this._call =
-  this._time =
-  this._next = null;
-}
-
-Timer.prototype = timer.prototype = {
-  constructor: Timer,
-  restart: function(callback, delay, time) {
-    if (typeof callback !== "function") throw new TypeError("callback is not a function");
-    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
-    if (!this._next && taskTail !== this) {
-      if (taskTail) taskTail._next = this;
-      else taskHead = this;
-      taskTail = this;
-    }
-    this._call = callback;
-    this._time = time;
-    sleep();
-  },
-  stop: function() {
-    if (this._call) {
-      this._call = null;
-      this._time = Infinity;
-      sleep();
-    }
-  }
-};
-
-function timer(callback, delay, time) {
-  var t = new Timer;
-  t.restart(callback, delay, time);
-  return t;
-}
-
-function timerFlush() {
-  now(); // Get the current time, if not already set.
-  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
-  var t = taskHead, e;
-  while (t) {
-    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
-    t = t._next;
-  }
-  --frame;
-}
-
-function wake() {
-  clockNow = (clockLast = clock.now()) + clockSkew;
-  frame = timeout = 0;
-  try {
-    timerFlush();
-  } finally {
-    frame = 0;
-    nap();
-    clockNow = 0;
-  }
-}
-
-function poke() {
-  var now = clock.now(), delay = now - clockLast;
-  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
-}
-
-function nap() {
-  var t0, t1 = taskHead, t2, time = Infinity;
-  while (t1) {
-    if (t1._call) {
-      if (time > t1._time) time = t1._time;
-      t0 = t1, t1 = t1._next;
-    } else {
-      t2 = t1._next, t1._next = null;
-      t1 = t0 ? t0._next = t2 : taskHead = t2;
-    }
-  }
-  taskTail = t0;
-  sleep(time);
-}
-
-function sleep(time) {
-  if (frame) return; // Soonest alarm already set, or will be.
-  if (timeout) timeout = clearTimeout(timeout);
-  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
-  if (delay > 24) {
-    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
-    if (interval) interval = clearInterval(interval);
-  } else {
-    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
-    frame = 1, setFrame(wake);
-  }
-}
-
-var timeout$1 = function(callback, delay, time) {
-  var t = new Timer;
-  delay = delay == null ? 0 : +delay;
-  t.restart(function(elapsed) {
-    t.stop();
-    callback(elapsed + delay);
-  }, delay, time);
-  return t;
-};
-
-var emptyOn = dispatch("start", "end", "interrupt");
-var emptyTween = [];
-
-var CREATED = 0;
-var SCHEDULED = 1;
-var STARTING = 2;
-var STARTED = 3;
-var RUNNING = 4;
-var ENDING = 5;
-var ENDED = 6;
-
-var schedule = function(node, name, id, index, group, timing) {
-  var schedules = node.__transition;
-  if (!schedules) node.__transition = {};
-  else if (id in schedules) return;
-  create(node, id, {
-    name: name,
-    index: index, // For context during callback.
-    group: group, // For context during callback.
-    on: emptyOn,
-    tween: emptyTween,
-    time: timing.time,
-    delay: timing.delay,
-    duration: timing.duration,
-    ease: timing.ease,
-    timer: null,
-    state: CREATED
-  });
-};
-
-function init(node, id) {
-  var schedule = node.__transition;
-  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
-  return schedule;
-}
-
-function set$2(node, id) {
-  var schedule = node.__transition;
-  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
-  return schedule;
-}
-
-function get(node, id) {
-  var schedule = node.__transition;
-  if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
-  return schedule;
-}
-
-function create(node, id, self) {
-  var schedules = node.__transition,
-      tween;
-
-  // Initialize the self timer when the transition is created.
-  // Note the actual delay is not known until the first callback!
-  schedules[id] = self;
-  self.timer = timer(schedule, 0, self.time);
-
-  function schedule(elapsed) {
-    self.state = SCHEDULED;
-    self.timer.restart(start, self.delay, self.time);
-
-    // If the elapsed delay is less than our first sleep, start immediately.
-    if (self.delay <= elapsed) start(elapsed - self.delay);
-  }
-
-  function start(elapsed) {
-    var i, j, n, o;
-
-    // If the state is not SCHEDULED, then we previously errored on start.
-    if (self.state !== SCHEDULED) return stop();
-
-    for (i in schedules) {
-      o = schedules[i];
-      if (o.name !== self.name) continue;
-
-      // While this element already has a starting transition during this frame,
-      // defer starting an interrupting transition until that transition has a
-      // chance to tick (and possibly end); see d3/d3-transition#54!
-      if (o.state === STARTED) return timeout$1(start);
-
-      // Interrupt the active transition, if any.
-      // Dispatch the interrupt event.
-      if (o.state === RUNNING) {
-        o.state = ENDED;
-        o.timer.stop();
-        o.on.call("interrupt", node, node.__data__, o.index, o.group);
-        delete schedules[i];
-      }
-
-      // Cancel any pre-empted transitions. No interrupt event is dispatched
-      // because the cancelled transitions never started. Note that this also
-      // removes this transition from the pending list!
-      else if (+i < id) {
-        o.state = ENDED;
-        o.timer.stop();
-        delete schedules[i];
-      }
-    }
-
-    // Defer the first tick to end of the current frame; see d3/d3#1576.
-    // Note the transition may be canceled after start and before the first tick!
-    // Note this must be scheduled before the start event; see d3/d3-transition#16!
-    // Assuming this is successful, subsequent callbacks go straight to tick.
-    timeout$1(function() {
-      if (self.state === STARTED) {
-        self.state = RUNNING;
-        self.timer.restart(tick, self.delay, self.time);
-        tick(elapsed);
-      }
-    });
-
-    // Dispatch the start event.
-    // Note this must be done before the tween are initialized.
-    self.state = STARTING;
-    self.on.call("start", node, node.__data__, self.index, self.group);
-    if (self.state !== STARTING) return; // interrupted
-    self.state = STARTED;
-
-    // Initialize the tween, deleting null tween.
-    tween = new Array(n = self.tween.length);
-    for (i = 0, j = -1; i < n; ++i) {
-      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
-        tween[++j] = o;
-      }
-    }
-    tween.length = j + 1;
-  }
-
-  function tick(elapsed) {
-    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
-        i = -1,
-        n = tween.length;
-
-    while (++i < n) {
-      tween[i].call(null, t);
-    }
-
-    // Dispatch the end event.
-    if (self.state === ENDING) {
-      self.on.call("end", node, node.__data__, self.index, self.group);
-      stop();
-    }
-  }
-
-  function stop() {
-    self.state = ENDED;
-    self.timer.stop();
-    delete schedules[id];
-    for (var i in schedules) return; // eslint-disable-line no-unused-vars
-    delete node.__transition;
-  }
-}
-
-var interrupt = function(node, name) {
-  var schedules = node.__transition,
-      schedule$$1,
-      active,
-      empty = true,
-      i;
-
-  if (!schedules) return;
-
-  name = name == null ? null : name + "";
-
-  for (i in schedules) {
-    if ((schedule$$1 = schedules[i]).name !== name) { empty = false; continue; }
-    active = schedule$$1.state > STARTING && schedule$$1.state < ENDING;
-    schedule$$1.state = ENDED;
-    schedule$$1.timer.stop();
-    if (active) schedule$$1.on.call("interrupt", node, node.__data__, schedule$$1.index, schedule$$1.group);
-    delete schedules[i];
-  }
-
-  if (empty) delete node.__transition;
-};
-
-var selection_interrupt = function(name) {
-  return this.each(function() {
-    interrupt(this, name);
-  });
-};
-
-function tweenRemove(id, name) {
-  var tween0, tween1;
-  return function() {
-    var schedule$$1 = set$2(this, id),
-        tween = schedule$$1.tween;
-
-    // If this node shared tween with the previous node,
-    // just assign the updated shared tween and we’re done!
-    // Otherwise, copy-on-write.
-    if (tween !== tween0) {
-      tween1 = tween0 = tween;
-      for (var i = 0, n = tween1.length; i < n; ++i) {
-        if (tween1[i].name === name) {
-          tween1 = tween1.slice();
-          tween1.splice(i, 1);
-          break;
-        }
-      }
-    }
-
-    schedule$$1.tween = tween1;
-  };
-}
-
-function tweenFunction(id, name, value) {
-  var tween0, tween1;
-  if (typeof value !== "function") throw new Error;
-  return function() {
-    var schedule$$1 = set$2(this, id),
-        tween = schedule$$1.tween;
-
-    // If this node shared tween with the previous node,
-    // just assign the updated shared tween and we’re done!
-    // Otherwise, copy-on-write.
-    if (tween !== tween0) {
-      tween1 = (tween0 = tween).slice();
-      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
-        if (tween1[i].name === name) {
-          tween1[i] = t;
-          break;
-        }
-      }
-      if (i === n) tween1.push(t);
-    }
-
-    schedule$$1.tween = tween1;
-  };
-}
-
-var transition_tween = function(name, value) {
-  var id = this._id;
-
-  name += "";
-
-  if (arguments.length < 2) {
-    var tween = get(this.node(), id).tween;
-    for (var i = 0, n = tween.length, t; i < n; ++i) {
-      if ((t = tween[i]).name === name) {
-        return t.value;
-      }
-    }
-    return null;
-  }
-
-  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
-};
-
-function tweenValue(transition, name, value) {
-  var id = transition._id;
-
-  transition.each(function() {
-    var schedule$$1 = set$2(this, id);
-    (schedule$$1.value || (schedule$$1.value = {}))[name] = value.apply(this, arguments);
-  });
-
-  return function(node) {
-    return get(node, id).value[name];
-  };
-}
-
-var interpolate = function(a, b) {
-  var c;
-  return (typeof b === "number" ? interpolateNumber
-      : b instanceof color ? interpolateRgb
-      : (c = color(b)) ? (b = c, interpolateRgb)
-      : interpolateString)(a, b);
-};
-
-function attrRemove$1(name) {
-  return function() {
-    this.removeAttribute(name);
-  };
-}
-
-function attrRemoveNS$1(fullname) {
-  return function() {
-    this.removeAttributeNS(fullname.space, fullname.local);
-  };
-}
-
-function attrConstant$1(name, interpolate$$1, value1) {
-  var value00,
-      interpolate0;
-  return function() {
-    var value0 = this.getAttribute(name);
-    return value0 === value1 ? null
-        : value0 === value00 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value1);
-  };
-}
-
-function attrConstantNS$1(fullname, interpolate$$1, value1) {
-  var value00,
-      interpolate0;
-  return function() {
-    var value0 = this.getAttributeNS(fullname.space, fullname.local);
-    return value0 === value1 ? null
-        : value0 === value00 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value1);
-  };
-}
-
-function attrFunction$1(name, interpolate$$1, value) {
-  var value00,
-      value10,
-      interpolate0;
-  return function() {
-    var value0, value1 = value(this);
-    if (value1 == null) return void this.removeAttribute(name);
-    value0 = this.getAttribute(name);
-    return value0 === value1 ? null
-        : value0 === value00 && value1 === value10 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
-  };
-}
-
-function attrFunctionNS$1(fullname, interpolate$$1, value) {
-  var value00,
-      value10,
-      interpolate0;
-  return function() {
-    var value0, value1 = value(this);
-    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
-    value0 = this.getAttributeNS(fullname.space, fullname.local);
-    return value0 === value1 ? null
-        : value0 === value00 && value1 === value10 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
-  };
-}
-
-var transition_attr = function(name, value) {
-  var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate;
-  return this.attrTween(name, typeof value === "function"
-      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
-      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
-      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + ""));
-};
-
-function attrTweenNS(fullname, value) {
-  function tween() {
-    var node = this, i = value.apply(node, arguments);
-    return i && function(t) {
-      node.setAttributeNS(fullname.space, fullname.local, i(t));
-    };
-  }
-  tween._value = value;
-  return tween;
-}
-
-function attrTween(name, value) {
-  function tween() {
-    var node = this, i = value.apply(node, arguments);
-    return i && function(t) {
-      node.setAttribute(name, i(t));
-    };
-  }
-  tween._value = value;
-  return tween;
-}
-
-var transition_attrTween = function(name, value) {
-  var key = "attr." + name;
-  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
-  if (value == null) return this.tween(key, null);
-  if (typeof value !== "function") throw new Error;
-  var fullname = namespace(name);
-  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
-};
-
-function delayFunction(id, value) {
-  return function() {
-    init(this, id).delay = +value.apply(this, arguments);
-  };
-}
-
-function delayConstant(id, value) {
-  return value = +value, function() {
-    init(this, id).delay = value;
-  };
-}
-
-var transition_delay = function(value) {
-  var id = this._id;
-
-  return arguments.length
-      ? this.each((typeof value === "function"
-          ? delayFunction
-          : delayConstant)(id, value))
-      : get(this.node(), id).delay;
-};
-
-function durationFunction(id, value) {
-  return function() {
-    set$2(this, id).duration = +value.apply(this, arguments);
-  };
-}
-
-function durationConstant(id, value) {
-  return value = +value, function() {
-    set$2(this, id).duration = value;
-  };
-}
-
-var transition_duration = function(value) {
-  var id = this._id;
-
-  return arguments.length
-      ? this.each((typeof value === "function"
-          ? durationFunction
-          : durationConstant)(id, value))
-      : get(this.node(), id).duration;
-};
-
-function easeConstant(id, value) {
-  if (typeof value !== "function") throw new Error;
-  return function() {
-    set$2(this, id).ease = value;
-  };
-}
-
-var transition_ease = function(value) {
-  var id = this._id;
-
-  return arguments.length
-      ? this.each(easeConstant(id, value))
-      : get(this.node(), id).ease;
-};
-
-var transition_filter = function(match) {
-  if (typeof match !== "function") match = matcher$1(match);
-
-  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-        subgroup.push(node);
-      }
-    }
-  }
-
-  return new Transition(subgroups, this._parents, this._name, this._id);
-};
-
-var transition_merge = function(transition$$1) {
-  if (transition$$1._id !== this._id) throw new Error;
-
-  for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-      if (node = group0[i] || group1[i]) {
-        merge[i] = node;
-      }
-    }
-  }
-
-  for (; j < m0; ++j) {
-    merges[j] = groups0[j];
-  }
-
-  return new Transition(merges, this._parents, this._name, this._id);
-};
-
-function start(name) {
-  return (name + "").trim().split(/^|\s+/).every(function(t) {
-    var i = t.indexOf(".");
-    if (i >= 0) t = t.slice(0, i);
-    return !t || t === "start";
-  });
-}
-
-function onFunction(id, name, listener) {
-  var on0, on1, sit = start(name) ? init : set$2;
-  return function() {
-    var schedule$$1 = sit(this, id),
-        on = schedule$$1.on;
-
-    // If this node shared a dispatch with the previous node,
-    // just assign the updated shared dispatch and we’re done!
-    // Otherwise, copy-on-write.
-    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
-
-    schedule$$1.on = on1;
-  };
-}
-
-var transition_on = function(name, listener) {
-  var id = this._id;
-
-  return arguments.length < 2
-      ? get(this.node(), id).on.on(name)
-      : this.each(onFunction(id, name, listener));
-};
-
-function removeFunction(id) {
-  return function() {
-    var parent = this.parentNode;
-    for (var i in this.__transition) if (+i !== id) return;
-    if (parent) parent.removeChild(this);
-  };
-}
-
-var transition_remove = function() {
-  return this.on("end.remove", removeFunction(this._id));
-};
-
-var transition_select = function(select) {
-  var name = this._name,
-      id = this._id;
-
-  if (typeof select !== "function") select = selector(select);
-
-  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-        if ("__data__" in node) subnode.__data__ = node.__data__;
-        subgroup[i] = subnode;
-        schedule(subgroup[i], name, id, i, subgroup, get(node, id));
-      }
-    }
-  }
-
-  return new Transition(subgroups, this._parents, name, id);
-};
-
-var transition_selectAll = function(select) {
-  var name = this._name,
-      id = this._id;
-
-  if (typeof select !== "function") select = selectorAll(select);
-
-  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-      if (node = group[i]) {
-        for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {
-          if (child = children[k]) {
-            schedule(child, name, id, k, children, inherit);
-          }
-        }
-        subgroups.push(children);
-        parents.push(node);
-      }
-    }
-  }
-
-  return new Transition(subgroups, parents, name, id);
-};
-
-var Selection$1 = selection.prototype.constructor;
-
-var transition_selection = function() {
-  return new Selection$1(this._groups, this._parents);
-};
-
-function styleRemove$1(name, interpolate$$1) {
-  var value00,
-      value10,
-      interpolate0;
-  return function() {
-    var value0 = styleValue(this, name),
-        value1 = (this.style.removeProperty(name), styleValue(this, name));
-    return value0 === value1 ? null
-        : value0 === value00 && value1 === value10 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
-  };
-}
-
-function styleRemoveEnd(name) {
-  return function() {
-    this.style.removeProperty(name);
-  };
-}
-
-function styleConstant$1(name, interpolate$$1, value1) {
-  var value00,
-      interpolate0;
-  return function() {
-    var value0 = styleValue(this, name);
-    return value0 === value1 ? null
-        : value0 === value00 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value1);
-  };
-}
-
-function styleFunction$1(name, interpolate$$1, value) {
-  var value00,
-      value10,
-      interpolate0;
-  return function() {
-    var value0 = styleValue(this, name),
-        value1 = value(this);
-    if (value1 == null) value1 = (this.style.removeProperty(name), styleValue(this, name));
-    return value0 === value1 ? null
-        : value0 === value00 && value1 === value10 ? interpolate0
-        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
-  };
-}
-
-var transition_style = function(name, value, priority) {
-  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
-  return value == null ? this
-          .styleTween(name, styleRemove$1(name, i))
-          .on("end.style." + name, styleRemoveEnd(name))
-      : this.styleTween(name, typeof value === "function"
-          ? styleFunction$1(name, i, tweenValue(this, "style." + name, value))
-          : styleConstant$1(name, i, value + ""), priority);
-};
-
-function styleTween(name, value, priority) {
-  function tween() {
-    var node = this, i = value.apply(node, arguments);
-    return i && function(t) {
-      node.style.setProperty(name, i(t), priority);
-    };
-  }
-  tween._value = value;
-  return tween;
-}
-
-var transition_styleTween = function(name, value, priority) {
-  var key = "style." + (name += "");
-  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
-  if (value == null) return this.tween(key, null);
-  if (typeof value !== "function") throw new Error;
-  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
-};
-
-function textConstant$1(value) {
-  return function() {
-    this.textContent = value;
-  };
-}
-
-function textFunction$1(value) {
-  return function() {
-    var value1 = value(this);
-    this.textContent = value1 == null ? "" : value1;
-  };
-}
-
-var transition_text = function(value) {
-  return this.tween("text", typeof value === "function"
-      ? textFunction$1(tweenValue(this, "text", value))
-      : textConstant$1(value == null ? "" : value + ""));
-};
-
-var transition_transition = function() {
-  var name = this._name,
-      id0 = this._id,
-      id1 = newId();
-
-  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-      if (node = group[i]) {
-        var inherit = get(node, id0);
-        schedule(node, name, id1, i, group, {
-          time: inherit.time + inherit.delay + inherit.duration,
-          delay: 0,
-          duration: inherit.duration,
-          ease: inherit.ease
-        });
-      }
-    }
-  }
-
-  return new Transition(groups, this._parents, name, id1);
-};
-
-var id = 0;
-
-function Transition(groups, parents, name, id) {
-  this._groups = groups;
-  this._parents = parents;
-  this._name = name;
-  this._id = id;
-}
-
-function transition(name) {
-  return selection().transition(name);
-}
-
-function newId() {
-  return ++id;
-}
-
-var selection_prototype = selection.prototype;
-
-Transition.prototype = transition.prototype = {
-  constructor: Transition,
-  select: transition_select,
-  selectAll: transition_selectAll,
-  filter: transition_filter,
-  merge: transition_merge,
-  selection: transition_selection,
-  transition: transition_transition,
-  call: selection_prototype.call,
-  nodes: selection_prototype.nodes,
-  node: selection_prototype.node,
-  size: selection_prototype.size,
-  empty: selection_prototype.empty,
-  each: selection_prototype.each,
-  on: transition_on,
-  attr: transition_attr,
-  attrTween: transition_attrTween,
-  style: transition_style,
-  styleTween: transition_styleTween,
-  text: transition_text,
-  remove: transition_remove,
-  tween: transition_tween,
-  delay: transition_delay,
-  duration: transition_duration,
-  ease: transition_ease
-};
-
-var defaultTiming = {
-  time: null, // Set on use.
-  delay: 0,
-  duration: 250,
-  ease: cubicInOut
-};
-
-function inherit(node, id) {
-  var timing;
-  while (!(timing = node.__transition) || !(timing = timing[id])) {
-    if (!(node = node.parentNode)) {
-      return defaultTiming.time = now(), defaultTiming;
-    }
-  }
-  return timing;
-}
-
-var selection_transition = function(name) {
-  var id,
-      timing;
-
-  if (name instanceof Transition) {
-    id = name._id, name = name._name;
-  } else {
-    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
-  }
-
-  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-      if (node = group[i]) {
-        schedule(node, name, id, i, group, timing || inherit(node, id));
-      }
-    }
-  }
-
-  return new Transition(groups, this._parents, name, id);
-};
-
-selection.prototype.interrupt = selection_interrupt;
-selection.prototype.transition = selection_transition;
-
-exports.select = select;
-exports.selection = selection;
-exports.hierarchy = hierarchy;
-exports.partition = partition;
-exports.scaleLinear = linear;
-exports.easeCubic = cubicInOut;
-exports.ascending = ascending$1;
-exports.map = map$1;
-exports.transition = transition;
-
-Object.defineProperty(exports, '__esModule', { value: true });
-
-})));
-`
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/LICENSE b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_FLAME_GRAPH_LICENSE
similarity index 100%
rename from src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/LICENSE
rename to src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_FLAME_GRAPH_LICENSE
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_LICENSE b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_LICENSE
new file mode 100644
index 0000000000..b0145150fd
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/D3_LICENSE
@@ -0,0 +1,13 @@
+Copyright 2010-2021 Mike Bostock
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/README.md b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/README.md
new file mode 100644
index 0000000000..94055d2846
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/README.md
@@ -0,0 +1,33 @@
+# Building a customized D3.js bundle
+
+The D3.js version distributed with pprof is customized to only include the
+modules required by pprof.
+
+## Dependencies
+
+- Install [npm](https://www.npmjs.com).
+
+## Building
+
+- Run `update.sh` to:
+  - Download npm package dependencies (declared in `package.json` and `package-lock.json`)
+  - Create a d3.js bundle containing the JavScript of d3 and d3-flame-graph (by running `webpack`)
+
+This will `d3_flame_graph.go`, the minified custom D3.js bundle as Go source code.
+
+# References / Appendix
+
+## D3 Custom Bundle
+
+A demonstration of building a custom D3 4.0 bundle using ES2015 modules and Rollup. 
+
+[bl.ocks.org/mbostock/bb09af4c39c79cffcde4](https://bl.ocks.org/mbostock/bb09af4c39c79cffcde4)
+
+## Old version of d3-pprof
+
+A previous verison of d3-flame-graph bundled for pprof used Rollup instead of
+Webpack. This has now been migrated directly into this directory.
+
+The repository configuring Rollup was here:
+
+[github.com/spiermar/d3-pprof](https://github.com/spiermar/d3-pprof)
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/d3_flame_graph.go b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/d3_flame_graph.go
index 58a7fb4c40..7e27941995 100644
--- a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/d3_flame_graph.go
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/d3_flame_graph.go
@@ -1,915 +1,17 @@
-// A D3.js plugin that produces flame graphs from hierarchical data.
+// D3.js is a JavaScript library for manipulating documents based on data.
+// https://github.com/d3/d3
+// See D3_LICENSE file for license details
+
+// d3-flame-graph is a D3.js plugin that produces flame graphs from hierarchical data.
 // https://github.com/spiermar/d3-flame-graph
-// Version 2.0.0-alpha4
-// See LICENSE file for license details
+// See D3_FLAME_GRAPH_LICENSE file for license details
 
 package d3flamegraph
 
-// JSSource returns the d3-flamegraph.js file
+// JSSource returns the d3 and d3-flame-graph JavaScript bundle
 const JSSource = `
-(function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3')) :
-	typeof define === 'function' && define.amd ? define(['exports', 'd3'], factory) :
-	(factory((global.d3 = global.d3 || {}),global.d3));
-}(this, (function (exports,d3) { 'use strict';
-
-var d3__default = 'default' in d3 ? d3['default'] : d3;
-
-var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-
-
-
-
-function createCommonjsModule(fn, module) {
-	return module = { exports: {} }, fn(module, module.exports), module.exports;
-}
-
-var d3Tip = createCommonjsModule(function (module) {
-// d3.tip
-// Copyright (c) 2013 Justin Palmer
-//
-// Tooltips for d3.js SVG visualizations
-
-(function (root, factory) {
-  if (typeof undefined === 'function' && undefined.amd) {
-    // AMD. Register as an anonymous module with d3 as a dependency.
-    undefined(['d3'], factory);
-  } else if ('object' === 'object' && module.exports) {
-    // CommonJS
-    var d3$$1 = d3__default;
-    module.exports = factory(d3$$1);
-  } else {
-    // Browser global.
-    root.d3.tip = factory(root.d3);
-  }
-}(commonjsGlobal, function (d3$$1) {
-
-  // Public - contructs a new tooltip
-  //
-  // Returns a tip
-  return function() {
-    var direction = d3_tip_direction,
-        offset    = d3_tip_offset,
-        html      = d3_tip_html,
-        node      = initNode(),
-        svg       = null,
-        point     = null,
-        target    = null;
-
-    function tip(vis) {
-      svg = getSVGNode(vis);
-      point = svg.createSVGPoint();
-      document.body.appendChild(node);
-    }
-
-    // Public - show the tooltip on the screen
-    //
-    // Returns a tip
-    tip.show = function() {
-      var args = Array.prototype.slice.call(arguments);
-      if(args[args.length - 1] instanceof SVGElement) target = args.pop();
-
-      var content = html.apply(this, args),
-          poffset = offset.apply(this, args),
-          dir     = direction.apply(this, args),
-          nodel   = getNodeEl(),
-          i       = directions.length,
-          coords,
-          scrollTop  = document.documentElement.scrollTop || document.body.scrollTop,
-          scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
-
-      nodel.html(content)
-        .style('opacity', 1).style('pointer-events', 'all');
-
-      while(i--) nodel.classed(directions[i], false);
-      coords = direction_callbacks.get(dir).apply(this);
-      nodel.classed(dir, true)
-      	.style('top', (coords.top +  poffset[0]) + scrollTop + 'px')
-      	.style('left', (coords.left + poffset[1]) + scrollLeft + 'px');
-
-      return tip;
-    };
-
-    // Public - hide the tooltip
-    //
-    // Returns a tip
-    tip.hide = function() {
-      var nodel = getNodeEl();
-      nodel.style('opacity', 0).style('pointer-events', 'none');
-      return tip
-    };
-
-    // Public: Proxy attr calls to the d3 tip container.  Sets or gets attribute value.
-    //
-    // n - name of the attribute
-    // v - value of the attribute
-    //
-    // Returns tip or attribute value
-    tip.attr = function(n, v) {
-      if (arguments.length < 2 && typeof n === 'string') {
-        return getNodeEl().attr(n)
-      } else {
-        var args =  Array.prototype.slice.call(arguments);
-        d3$$1.selection.prototype.attr.apply(getNodeEl(), args);
-      }
-
-      return tip
-    };
-
-    // Public: Proxy style calls to the d3 tip container.  Sets or gets a style value.
-    //
-    // n - name of the property
-    // v - value of the property
-    //
-    // Returns tip or style property value
-    tip.style = function(n, v) {
-      if (arguments.length < 2 && typeof n === 'string') {
-        return getNodeEl().style(n)
-      } else {
-        var args = Array.prototype.slice.call(arguments);
-        d3$$1.selection.prototype.style.apply(getNodeEl(), args);
-      }
-
-      return tip
-    };
-
-    // Public: Set or get the direction of the tooltip
-    //
-    // v - One of n(north), s(south), e(east), or w(west), nw(northwest),
-    //     sw(southwest), ne(northeast) or se(southeast)
-    //
-    // Returns tip or direction
-    tip.direction = function(v) {
-      if (!arguments.length) return direction
-      direction = v == null ? v : functor(v);
-
-      return tip
-    };
-
-    // Public: Sets or gets the offset of the tip
-    //
-    // v - Array of [x, y] offset
-    //
-    // Returns offset or
-    tip.offset = function(v) {
-      if (!arguments.length) return offset
-      offset = v == null ? v : functor(v);
-
-      return tip
-    };
-
-    // Public: sets or gets the html value of the tooltip
-    //
-    // v - String value of the tip
-    //
-    // Returns html value or tip
-    tip.html = function(v) {
-      if (!arguments.length) return html
-      html = v == null ? v : functor(v);
-
-      return tip
-    };
-
-    // Public: destroys the tooltip and removes it from the DOM
-    //
-    // Returns a tip
-    tip.destroy = function() {
-      if(node) {
-        getNodeEl().remove();
-        node = null;
-      }
-      return tip;
-    };
-
-    function d3_tip_direction() { return 'n' }
-    function d3_tip_offset() { return [0, 0] }
-    function d3_tip_html() { return ' ' }
-
-    var direction_callbacks = d3$$1.map({
-      n:  direction_n,
-      s:  direction_s,
-      e:  direction_e,
-      w:  direction_w,
-      nw: direction_nw,
-      ne: direction_ne,
-      sw: direction_sw,
-      se: direction_se
-    }),
-
-    directions = direction_callbacks.keys();
-
-    function direction_n() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.n.y - node.offsetHeight,
-        left: bbox.n.x - node.offsetWidth / 2
-      }
-    }
-
-    function direction_s() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.s.y,
-        left: bbox.s.x - node.offsetWidth / 2
-      }
-    }
-
-    function direction_e() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.e.y - node.offsetHeight / 2,
-        left: bbox.e.x
-      }
-    }
-
-    function direction_w() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.w.y - node.offsetHeight / 2,
-        left: bbox.w.x - node.offsetWidth
-      }
-    }
-
-    function direction_nw() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.nw.y - node.offsetHeight,
-        left: bbox.nw.x - node.offsetWidth
-      }
-    }
-
-    function direction_ne() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.ne.y - node.offsetHeight,
-        left: bbox.ne.x
-      }
-    }
-
-    function direction_sw() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.sw.y,
-        left: bbox.sw.x - node.offsetWidth
-      }
-    }
-
-    function direction_se() {
-      var bbox = getScreenBBox();
-      return {
-        top:  bbox.se.y,
-        left: bbox.e.x
-      }
-    }
-
-    function initNode() {
-      var node = d3$$1.select(document.createElement('div'));
-      node.style('position', 'absolute').style('top', 0).style('opacity', 0)
-      	.style('pointer-events', 'none').style('box-sizing', 'border-box');
-
-      return node.node()
-    }
-
-    function getSVGNode(el) {
-      el = el.node();
-      if(el.tagName.toLowerCase() === 'svg')
-        return el
-
-      return el.ownerSVGElement
-    }
-
-    function getNodeEl() {
-      if(node === null) {
-        node = initNode();
-        // re-add node to DOM
-        document.body.appendChild(node);
-      }
-      return d3$$1.select(node);
-    }
-
-    // Private - gets the screen coordinates of a shape
-    //
-    // Given a shape on the screen, will return an SVGPoint for the directions
-    // n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
-    // sw(southwest).
-    //
-    //    +-+-+
-    //    |   |
-    //    +   +
-    //    |   |
-    //    +-+-+
-    //
-    // Returns an Object {n, s, e, w, nw, sw, ne, se}
-    function getScreenBBox() {
-      var targetel   = target || d3$$1.event.target;
-
-      while ('undefined' === typeof targetel.getScreenCTM && 'undefined' === targetel.parentNode) {
-          targetel = targetel.parentNode;
-      }
-
-      var bbox       = {},
-          matrix     = targetel.getScreenCTM(),
-          tbbox      = targetel.getBBox(),
-          width      = tbbox.width,
-          height     = tbbox.height,
-          x          = tbbox.x,
-          y          = tbbox.y;
-
-      point.x = x;
-      point.y = y;
-      bbox.nw = point.matrixTransform(matrix);
-      point.x += width;
-      bbox.ne = point.matrixTransform(matrix);
-      point.y += height;
-      bbox.se = point.matrixTransform(matrix);
-      point.x -= width;
-      bbox.sw = point.matrixTransform(matrix);
-      point.y -= height / 2;
-      bbox.w  = point.matrixTransform(matrix);
-      point.x += width;
-      bbox.e = point.matrixTransform(matrix);
-      point.x -= width / 2;
-      point.y -= height / 2;
-      bbox.n = point.matrixTransform(matrix);
-      point.y += height;
-      bbox.s = point.matrixTransform(matrix);
-
-      return bbox
-    }
-    
-    // Private - replace D3JS 3.X d3.functor() function
-    function functor(v) {
-    	return typeof v === "function" ? v : function() {
-        return v
-    	}
-    }
-
-    return tip
-  };
-
-}));
-});
-
-var flamegraph = function () {
-  var w = 960; // graph width
-  var h = null; // graph height
-  var c = 18; // cell height
-  var selection = null; // selection
-  var tooltip = true; // enable tooltip
-  var title = ''; // graph title
-  var transitionDuration = 750;
-  var transitionEase = d3.easeCubic; // tooltip offset
-  var sort = false;
-  var inverted = false; // invert the graph direction
-  var clickHandler = null;
-  var minFrameSize = 0;
-  var details = null;
-
-  var tip = d3Tip()
-    .direction('s')
-    .offset([8, 0])
-    .attr('class', 'd3-flame-graph-tip')
-    .html(function (d) { return label(d) });
-
-  var svg;
-
-  function name (d) {
-    return d.data.n || d.data.name
-  }
-
-  function libtype (d) {
-    return d.data.l || d.data.libtype
-  }
-
-  function children (d) {
-    return d.c || d.children
-  }
-
-  function value (d) {
-    return d.v || d.value
-  }
-
-  var label = function (d) {
-    return name(d) + ' (' + d3.format('.3f')(100 * (d.x1 - d.x0), 3) + '%, ' + value(d) + ' samples)'
-  };
-
-  function setDetails (t) {
-    if (details) { details.innerHTML = t; }
-  }
-
-  var colorMapper = function (d) {
-    return d.highlight ? '#E600E6' : colorHash(name(d), libtype(d))
-  };
-
-  function generateHash (name) {
-    // Return a vector (0.0->1.0) that is a hash of the input string.
-    // The hash is computed to favor early characters over later ones, so
-    // that strings with similar starts have similar vectors. Only the first
-    // 6 characters are considered.
-    const MAX_CHAR = 6;
-
-    var hash = 0;
-    var maxHash = 0;
-    var weight = 1;
-    var mod = 10;
-
-    if (name) {
-      for (var i = 0; i < name.length; i++) {
-        if (i > MAX_CHAR) { break }
-        hash += weight * (name.charCodeAt(i) % mod);
-        maxHash += weight * (mod - 1);
-        weight *= 0.70;
-      }
-      if (maxHash > 0) { hash = hash / maxHash; }
-    }
-    return hash
-  }
-
-  function colorHash (name, libtype) {
-    // Return a color for the given name and library type. The library type
-    // selects the hue, and the name is hashed to a color in that hue.
-
-    var r;
-    var g;
-    var b;
-
-    // Select hue. Order is important.
-    var hue;
-    if (typeof libtype === 'undefined' || libtype === '') {
-      // default when libtype is not in use
-      hue = 'warm';
-    } else {
-      hue = 'red';
-      if (name.match(/::/)) {
-        hue = 'yellow';
-      }
-      if (libtype === 'kernel') {
-        hue = 'orange';
-      } else if (libtype === 'jit') {
-        hue = 'green';
-      } else if (libtype === 'inlined') {
-        hue = 'aqua';
-      }
-    }
-
-    // calculate hash
-    var vector = 0;
-    if (name) {
-      var nameArr = name.split('` + "`" + `');
-      if (nameArr.length > 1) {
-        name = nameArr[nameArr.length - 1]; // drop module name if present
-      }
-      name = name.split('(')[0]; // drop extra info
-      vector = generateHash(name);
-    }
-
-    // calculate color
-    if (hue === 'red') {
-      r = 200 + Math.round(55 * vector);
-      g = 50 + Math.round(80 * vector);
-      b = g;
-    } else if (hue === 'orange') {
-      r = 190 + Math.round(65 * vector);
-      g = 90 + Math.round(65 * vector);
-      b = 0;
-    } else if (hue === 'yellow') {
-      r = 175 + Math.round(55 * vector);
-      g = r;
-      b = 50 + Math.round(20 * vector);
-    } else if (hue === 'green') {
-      r = 50 + Math.round(60 * vector);
-      g = 200 + Math.round(55 * vector);
-      b = r;
-    } else if (hue === 'aqua') {
-      r = 50 + Math.round(60 * vector);
-      g = 165 + Math.round(55 * vector);
-      b = g;
-    } else {
-      // original warm palette
-      r = 200 + Math.round(55 * vector);
-      g = 0 + Math.round(230 * (1 - vector));
-      b = 0 + Math.round(55 * (1 - vector));
-    }
-
-    return 'rgb(' + r + ',' + g + ',' + b + ')'
-  }
-
-  function hide (d) {
-    d.data.hide = true;
-    if (children(d)) {
-      children(d).forEach(hide);
-    }
-  }
-
-  function show (d) {
-    d.data.fade = false;
-    d.data.hide = false;
-    if (children(d)) {
-      children(d).forEach(show);
-    }
-  }
-
-  function getSiblings (d) {
-    var siblings = [];
-    if (d.parent) {
-      var me = d.parent.children.indexOf(d);
-      siblings = d.parent.children.slice(0);
-      siblings.splice(me, 1);
-    }
-    return siblings
-  }
-
-  function hideSiblings (d) {
-    var siblings = getSiblings(d);
-    siblings.forEach(function (s) {
-      hide(s);
-    });
-    if (d.parent) {
-      hideSiblings(d.parent);
-    }
-  }
 
-  function fadeAncestors (d) {
-    if (d.parent) {
-      d.parent.data.fade = true;
-      fadeAncestors(d.parent);
-    }
-  }
-
-  // function getRoot (d) {
-  //   if (d.parent) {
-  //     return getRoot(d.parent)
-  //   }
-  //   return d
-  // }
-
-  function zoom (d) {
-    tip.hide(d);
-    hideSiblings(d);
-    show(d);
-    fadeAncestors(d);
-    update();
-    if (typeof clickHandler === 'function') {
-      clickHandler(d);
-    }
-  }
-
-  function searchTree (d, term) {
-    var re = new RegExp(term);
-    var searchResults = [];
-
-    function searchInner (d) {
-      var label = name(d);
-
-      if (children(d)) {
-        children(d).forEach(function (child) {
-          searchInner(child);
-        });
-      }
-
-      if (label.match(re)) {
-        d.highlight = true;
-        searchResults.push(d);
-      } else {
-        d.highlight = false;
-      }
-    }
-
-    searchInner(d);
-    return searchResults
-  }
-
-  function clear (d) {
-    d.highlight = false;
-    if (children(d)) {
-      children(d).forEach(function (child) {
-        clear(child);
-      });
-    }
-  }
-
-  function doSort (a, b) {
-    if (typeof sort === 'function') {
-      return sort(a, b)
-    } else if (sort) {
-      return d3.ascending(name(a), name(b))
-    }
-  }
-
-  var p = d3.partition();
-
-  function filterNodes (root) {
-    var nodeList = root.descendants();
-    if (minFrameSize > 0) {
-      var kx = w / (root.x1 - root.x0);
-      nodeList = nodeList.filter(function (el) {
-        return ((el.x1 - el.x0) * kx) > minFrameSize
-      });
-    }
-    return nodeList
-  }
-
-  function update () {
-    selection.each(function (root) {
-      var x = d3.scaleLinear().range([0, w]);
-      var y = d3.scaleLinear().range([0, c]);
-
-      if (sort) root.sort(doSort);
-      root.sum(function (d) {
-        if (d.fade || d.hide) {
-          return 0
-        }
-        // The node's self value is its total value minus all children.
-        var v = value(d);
-        if (children(d)) {
-          var c = children(d);
-          for (var i = 0; i < c.length; i++) {
-            v -= value(c[i]);
-          }
-        }
-        return v
-      });
-      p(root);
-
-      var kx = w / (root.x1 - root.x0);
-      function width (d) { return (d.x1 - d.x0) * kx }
-
-      var descendants = filterNodes(root);
-      var g = d3.select(this).select('svg').selectAll('g').data(descendants, function (d) { return d.id });
-
-      g.transition()
-        .duration(transitionDuration)
-        .ease(transitionEase)
-        .attr('transform', function (d) { return 'translate(' + x(d.x0) + ',' + (inverted ? y(d.depth) : (h - y(d.depth) - c)) + ')' });
-
-      g.select('rect')
-        .attr('width', width);
-
-      var node = g.enter()
-        .append('svg:g')
-        .attr('transform', function (d) { return 'translate(' + x(d.x0) + ',' + (inverted ? y(d.depth) : (h - y(d.depth) - c)) + ')' });
-
-      node.append('svg:rect')
-        .transition()
-        .delay(transitionDuration / 2)
-        .attr('width', width);
-
-      if (!tooltip) { node.append('svg:title'); }
-
-      node.append('foreignObject')
-        .append('xhtml:div');
-
-      // Now we have to re-select to see the new elements (why?).
-      g = d3.select(this).select('svg').selectAll('g').data(descendants, function (d) { return d.id });
-
-      g.attr('width', width)
-        .attr('height', function (d) { return c })
-        .attr('name', function (d) { return name(d) })
-        .attr('class', function (d) { return d.data.fade ? 'frame fade' : 'frame' });
-
-      g.select('rect')
-        .attr('height', function (d) { return c })
-        .attr('fill', function (d) { return colorMapper(d) });
-
-      if (!tooltip) {
-        g.select('title')
-          .text(label);
-      }
-
-      g.select('foreignObject')
-        .attr('width', width)
-        .attr('height', function (d) { return c })
-        .select('div')
-        .attr('class', 'd3-flame-graph-label')
-        .style('display', function (d) { return (width(d) < 35) ? 'none' : 'block' })
-        .transition()
-        .delay(transitionDuration)
-        .text(name);
-
-      g.on('click', zoom);
-
-      g.exit()
-        .remove();
-
-      g.on('mouseover', function (d) {
-        if (tooltip) tip.show(d, this);
-        setDetails(label(d));
-      }).on('mouseout', function (d) {
-        if (tooltip) tip.hide(d);
-        setDetails('');
-      });
-    });
-  }
-
-  function merge (data, samples) {
-    samples.forEach(function (sample) {
-      var node = data.find(function (element) {
-        return (element.name === sample.name)
-      });
-
-      if (node) {
-        if (node.original) {
-          node.original += sample.value;
-        } else {
-          node.value += sample.value;
-        }
-        if (sample.children) {
-          if (!node.children) {
-            node.children = [];
-          }
-          merge(node.children, sample.children);
-        }
-      } else {
-        data.push(sample);
-      }
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 `
 
 // CSSSource returns the d3-flamegraph.css file
@@ -951,59 +53,13 @@ const CSSSource = `
 }
 
 .d3-flame-graph-tip {
-  line-height: 1;
-  font-family: Verdana;
-  font-size: 12px;
-  padding: 12px;
-  background: rgba(0, 0, 0, 0.8);
-  color: #fff;
-  border-radius: 2px;
-  pointer-events: none;
-}
-
-/* Creates a small triangle extender for the tooltip */
-.d3-flame-graph-tip:after {
-  box-sizing: border-box;
-  display: inline;
-  font-size: 10px;
-  width: 100%;
-  line-height: 1;
-  color: rgba(0, 0, 0, 0.8);
-  position: absolute;
-  pointer-events: none;
-}
-
-/* Northward tooltips */
-.d3-flame-graph-tip.n:after {
-  content: "\25BC";
-  margin: -1px 0 0 0;
-  top: 100%;
-  left: 0;
-  text-align: center;
-}
-
-/* Eastward tooltips */
-.d3-flame-graph-tip.e:after {
-  content: "\25C0";
-  margin: -4px 0 0 0;
-  top: 50%;
-  left: -8px;
-}
-
-/* Southward tooltips */
-.d3-flame-graph-tip.s:after {
-  content: "\25B2";
-  margin: 0 0 1px 0;
-  top: -8px;
-  left: 0;
-  text-align: center;
-}
-
-/* Westward tooltips */
-.d3-flame-graph-tip.w:after {
-  content: "\25B6";
-  margin: -4px 0 0 -1px;
-  top: 50%;
-  left: 100%;
+    background-color: black;
+    border: none;
+    border-radius: 3px;
+    padding: 5px 10px 5px 10px;
+    min-width: 250px;
+    text-align: left;
+    color: white;
+    z-index: 10;
 }
 `
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/index.js b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/index.js
new file mode 100644
index 0000000000..d6e0b5b6ed
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/index.js
@@ -0,0 +1,13 @@
+// This file exports a stripped-down API surface of d3 and d3-flame-graph,
+// using only the functions used by pprof.
+
+export {
+  select,
+} from "d3-selection";
+
+export {
+  default as flamegraph
+// If we export from "d3-flame-graph" that exports the "dist" version which
+// includes another copy of d3-selection. To avoid including d3-selection
+// twice in the output, instead import the "src" version.
+} from "d3-flame-graph/src/flamegraph";
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package-lock.json b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package-lock.json
new file mode 100644
index 0000000000..d5caba62f8
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package-lock.json
@@ -0,0 +1,1106 @@
+{
+  "name": "d3-pprof",
+  "version": "2.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@discoveryjs/json-ext": {
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/@discoveryjs/json-ext/-/json-ext-0.5.6.tgz",
+      "integrity": "sha512-ws57AidsDvREKrZKYffXddNkyaF14iHNHm8VQnZH6t99E8gczjNN0GpvcGny0imC80yQ0tHz1xVUKk/KFQSUyA==",
+      "dev": true
+    },
+    "@types/eslint": {
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diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package.json b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package.json
new file mode 100644
index 0000000000..1df57f0399
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "d3-pprof",
+  "version": "2.0.0",
+  "description": "A d3.js bundle for pprof.",
+  "scripts": {
+    "prepare": "webpack --mode production"
+  },
+  "license": "Apache-2.0",
+  "dependencies": {
+    "d3-flame-graph": "^4.1.3",
+    "d3-selection": "^3.0.0"
+  },
+  "devDependencies": {
+    "webpack": "^5.64.4",
+    "webpack-cli": "^4.9.1"
+  }
+}
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/update.sh b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/update.sh
new file mode 100644
index 0000000000..7076c66673
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/update.sh
@@ -0,0 +1,62 @@
+#  Copyright 2021 Google Inc. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+#!/usr/bin/env bash
+
+set -eu
+set -o pipefail
+
+D3FLAMEGRAPH_CSS="d3-flamegraph.css"
+
+cd $(dirname $0)
+
+generate_d3_flame_graph_go() {
+    npm install
+    # https://stackoverflow.com/a/21199041/171898
+    local d3_js=$(cat d3.js | sed 's/`/`+"`"+`/g')
+    local d3_css=$(cat "node_modules/d3-flame-graph/dist/${D3FLAMEGRAPH_CSS}")
+
+    cat <<-EOF > d3_flame_graph.go
+// D3.js is a JavaScript library for manipulating documents based on data.
+// https://github.com/d3/d3
+// See D3_LICENSE file for license details
+
+// d3-flame-graph is a D3.js plugin that produces flame graphs from hierarchical data.
+// https://github.com/spiermar/d3-flame-graph
+// See D3_FLAME_GRAPH_LICENSE file for license details
+
+package d3flamegraph
+
+// JSSource returns the d3 and d3-flame-graph JavaScript bundle
+const JSSource = \`
+
+$d3_js
+\`
+
+// CSSSource returns the $D3FLAMEGRAPH_CSS file
+const CSSSource = \`
+$d3_css
+\`
+
+EOF
+    gofmt -w d3_flame_graph.go
+}
+
+get_licenses() {
+    cp node_modules/d3-selection/LICENSE D3_LICENSE
+    cp node_modules/d3-flame-graph/LICENSE D3_FLAME_GRAPH_LICENSE
+}
+
+get_licenses
+generate_d3_flame_graph_go
diff --git a/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/webpack.config.js b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/webpack.config.js
new file mode 100644
index 0000000000..71239d9e96
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/third_party/d3flamegraph/webpack.config.js
@@ -0,0 +1,13 @@
+// Minimal webpack config to package a minified JS bundle (including
+// dependencies) for execution in a <script> tag in the browser.
+module.exports = {
+  entry: './index.js',
+  output: {
+    path: __dirname,  // Directory containing this webpack.config.js file.
+    filename: 'd3.js',
+    // Arbitrary; many module formats could be used, just keeping Universal
+    // Module Definition as it's the same as what we used in a previous
+    // version.
+    libraryTarget: 'umd',
+  },
+};
diff --git a/src/cmd/vendor/modules.txt b/src/cmd/vendor/modules.txt
index 6efe7abc5c..e6989eaac8 100644
--- a/src/cmd/vendor/modules.txt
+++ b/src/cmd/vendor/modules.txt
@@ -1,4 +1,4 @@
-# github.com/google/pprof v0.0.0-20211104044539-f987b9c94b31
+# github.com/google/pprof v0.0.0-20220314021825-5bba342933ea
 ## explicit; go 1.14
 github.com/google/pprof/driver
 github.com/google/pprof/internal/binutils
@@ -12,7 +12,6 @@ github.com/google/pprof/internal/symbolizer
 github.com/google/pprof/internal/symbolz
 github.com/google/pprof/internal/transport
 github.com/google/pprof/profile
-github.com/google/pprof/third_party/d3
 github.com/google/pprof/third_party/d3flamegraph
 github.com/google/pprof/third_party/svgpan
 # github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d
-- 
2.50.0