<p>
The release <a href="#ports">adds support for 32-bit MIPS</a>,
<a href="#compiler">updates the compiler back end</a> to generate more efficient code,
-produces smaller binaries (TODO: link/numbers),
<a href="#gc">reduces GC pauses</a> by eliminating stop-the-world stack rescanning,
<a href="#h2push">adds HTTP/2 Push support</a>,
<a href="#httpshutdown">adds HTTP graceful shutdown</a>,
<h3 id="defer">Defer</h3>
+<!-- CL 29656, CL 29656 -->
<p><code>defer</code> calls are now about twice as fast.</p>
<h3 id="cgoperf">Cgo</h3>
<dl id="archive_tar"><dt><a href="/pkg/archive/tar/">archive/tar</a></dt>
<dd>
- <p>
+ <p> <!-- CL 28471, CL 31440, CL 31441, CL 31444, CL 28418, CL 31439 -->
The tar implementation corrects many bugs in corner cases of the file format.
The <a href="/pkg/archive/tar/#Reader"><code>Reader</code></a> is now able to process tar files in the PAX format with entries larger than 8GB.
The <a href="/pkg/archive/tar/#Writer"><code>Writer</code></a> no longer produces invalid tar files in some situations involving long pathnames.
</dd>
</dl>
+<dl id="archive_zip"><dt><a href="/pkg/archive/zip/">archive/zip</a></dt>
+ <dd>
+
+ <p> <!-- CL 18274 -->
+ The zip <code>Reader</code> now supports modification times in
+ the NTFS, UNIX, and Extended Time Stamp metadata fields.
+ <!-- CL 30811 -->
+ When writing zip files, the Extended Time Stamp field is written
+ if TODO: validate implementation.
+ </p>
+
+ </dd>
+</dl>
<dl id="compress_flate"><dt><a href="/pkg/compress/flate/">compress/flate</a></dt>
<dd>
- <p>
+ <p> <!-- CL 31640, CL 31174, CL 32149 -->
There have been some minor fixes to the encoder to improve the
compression ratio in certain situations. As a result, the exact
encoded output of DEFLATE may be different from Go 1.7. Since
method.
</p>
+ <p> <!-- CL 28216 -->
+ The decoder, upon encountering an error, now returns any
+ buffered data it had uncompressed along with the error.
+ </p>
+
</dd>
</dl>
</dd>
</dl>
-<dl id="encoding_binary"><dt><a href="/pkg/encoding/">encoding/binary</a></dt>
+<dl id="debug_pe"><dt><a href="/pkg/debug/pe/">debug/pe</a></dt>
+ <dd>
+ <p> <!-- CL 22720, CL 27212, CL 22181, CL 22332, CL 22336, Issue 15345 -->
+ TODO: describe Issue 15345 and CL 22181, CL 22332, CL 22336
+ <pre>pkg debug/pe, method (*COFFSymbol) FullName(StringTable) (string, error)
+pkg debug/pe, method (StringTable) String(uint32) (string, error)
+pkg debug/pe, type File struct, COFFSymbols []COFFSymbol
+pkg debug/pe, type File struct, StringTable StringTable
+pkg debug/pe, type Reloc struct
+pkg debug/pe, type Reloc struct, SymbolTableIndex uint32
+pkg debug/pe, type Reloc struct, Type uint16
+pkg debug/pe, type Reloc struct, VirtualAddress uint32
+pkg debug/pe, type Section struct, Relocs []Reloc
+pkg debug/pe, type StringTable []uint8</pre>
+ </p>
+ </dd>
+</dl>
+
+<dl id="encoding_base64"><dt><a href="/pkg/encoding/base64/">encoding/base64</a></dt>
+ <dd>
+ <p> <!-- CL 24964 -->
+ The new <a href="/pkg/encoding/base64/#Encoding.Strict"><code>Encoding.Strict</code></a> method returns an <code>Encoding</code> that causes the decoder to return an error when the trailing padding bits are not zero.
+ </p>
+ </dd>
+</dl>
+
+<dl id="encoding_binary"><dt><a href="/pkg/encoding/binary/">encoding/binary</a></dt>
<dd>
<p> <!-- CL 28514 -->
The package now supports boolean values.
</dd>
</dl>
+<dl id="encoding_json"><dt><a href="/pkg/encoding/json/">encoding/json</a></dt>
+ <dd>
+
+ <p> <!-- CL 18692 -->
+ <a href="/pkg/encoding/json/#UnmarshalTypeError"><code>UnmarshalTypeError</code></a>
+ now includes the struct and field name.
+ </p>
+
+ <p> <!-- CL 31932 -->
+ A <code>nil</code> <a href="/pkg/encoding/json/#Marshaler"><code>Marshaler</code></a>
+ now marshals as a JSON "<code>null</code>" value.
+ </p>
+
+ <p> <!-- CL 21811 -->
+ A <a href="/pkg/encoding/json/#RawMessage"><code>RawMessage</code></a> value now
+ marshals the same as its pointer type.
+ </p>
+
+ <p> <!-- CL 30371 -->
+ Numbers are now formatted in the same floating point format as they are in ES6.
+ </p>
+
+ <p> <!-- CL 30944 -->
+ Implementations
+ of <a href="/pkg/encoding/json/#Unmarshaler"><code>Unmarshaler</code></a>
+ are now called with the literal "<code>null</code>" and can
+ decide what to do with it.
+ </p>
+
+ </dd>
+</dl>
+
+<dl id="encoding_pem"><dt><a href="/pkg/encoding/pem/">encoding/pem</a></dt>
+ <dd>
+ <p> <!-- CL 27391 -->
+ The PEM decoder is now strict about the format of the ending line.
+ </p>
+ </dd>
+</dl>
+
<dl id="expvar"><dt><a href="/pkg/expvar/">expvar</a></dt>
<dd>
<p> <!-- CL 30917 -->
</dd>
</dl>
+
<dl id="image_png"><dt><a href="/pkg/image/png/">image/png</a></dt>
<dd>
<p> <!-- CL 32143, CL 32140 -->
<a href="/pkg/net/url/#PathEscape"><code>PathEscape</code></a>
and
<a href="/pkg/net/url/#PathUnescape"><code>PathUnescape</code></a>
- deal with path escaping.</p>
+ are similar to the query escaping and unescaping functions but
+ don't treat spaces specially.</p>
<p> <!-- CL 28933 --> The new methods
<a href="/pkg/net/url/#URL.Hostname"><code>URL.Hostname</code></a>
addition to days that are too large.
</p>
+ <p> <!-- CL 33029 -->
+ The <code>tzdata</code> database has been updated to version
+ 2016i for systems that don't already have a local time zone
+ database.
+ </p>
+
<p>
</dd>
</dl>
API additions and behavior changes:
-archive/tar: fix and cleanup readOldGNUSparseMap (CL 28471)
-archive/tar: fix parsePAX to be POSIX.1-2001 compliant (CL 31440)
-archive/tar: fix parsePAXTime (CL 31441)
-archive/tar: make Reader handle GNU format properly (CL 31444)
-archive/tar: reapply Header.Size to regFileReader after merging (CL 28418)
-archive/tar: validate sparse headers in parsePAX (CL 31439)
-
-archive/zip: handle mtime in NTFS/UNIX/ExtendedTS extra fields (CL 18274)
-archive/zip: only use Extended Timestamp on non-zero MS-DOS timestamps (CL 30811)
-
cmd/cgo: add #line directives to avoid printing bogus references to Go source files (CL 32613)
cmd/cgo: add -srcdir option (CL 32354)
cmd/cgo: don't ignore qualifiers, don't cast to void* (CL 33097)
cmd/compile/internal/gc: add runtime/trace support (CL 25354)
cmd/compile/internal/gc: enable new parser by default (CL 27203)
cmd/compile/internal/syntax: fast Go syntax trees, initial commit (CL 27195)
-cmd/compile: add SSA backend for s390x and enable by default (CL 28978)
cmd/compile: add compiler phase timing (CL 24462)
-cmd/compile: add go:notinheap type pragma (CL 30939)
cmd/compile: add inline explainer (CL 22782)
-cmd/compile: do more type conversion inline (CL 32313)
cmd/compile: enable flag-specified dump of specific phase+function (CL 23044)
-cmd/compile: fail gracefully on export format skew (CL 27814)
-cmd/compile: inline convI2E (CL 31260)
cmd/compile: remove -A flag (CL 31497)
-cmd/compile: remove support for textual export format (CL 27171)
cmd/cover: Fix compiler directives handling (CL 30161)
cmd/cover: change covered block for switch/select case to exclude expression (CL 32612)
cmd/vet: properly handle indexed arguments in printf (CL 24391)
cmd/vet: skip printf check for non-constant format string during failed import (CL 29014)
-compress/flate: always return uncompressed data in the event of error (CL 28216)
-compress/flate: level 1 (best speed) match across blocks (CL 31640)
-compress/flate: make compression level 0 consistent (CL 31174)
-compress/flate: tighten the BestSpeed max match offset bound. (CL 32149)
-compress/gzip, compress/zlib: add HuffmanOnly as compression levels. (CL 31186)
-compress/gzip: only encode MTIME if it is valid (CL 32325)
-
crypto/cipher: enforce message size limits for GCM (CL 28410)
-crypto/rsa: ensure that generating toy RSA keys doesn't loop (CL 28969)
crypto/tls: add CloseWrite method to Conn (CL 25159, 31318)
crypto/tls: add Config.Clone (CL 28075)
crypto/tls: support AES-128-CBC cipher suites with SHA-256 (CL 27315)
crypto/tls: support ChaCha20-Poly1305. (CL 30957)
crypto/tls: support X25519 (CL 30824, CL 30825)
+crypto/{tls,cipher,internal/cryptohw}: prioritise AES-GCM when hardware support is present. (CL 32871)
crypto/x509: Fix bug in UnknownAuthorityError.Error (CL 27992)
crypto/x509: allow a leaf certificate to be specified directly as root (CL 27393)
crypto/x509: support PSS signatures (CL 24743)
crypto/x509: support RHEL 7 cert bundle (CL 30375)
-crypto/{cipher,tls,internal/cryptohw}: prioritise AES-GCM when hardware support is present. (CL 32871)
-
database/sql: accept nil pointers to Valuers implemented on value receivers (CL 31259)
database/sql: add Pinger interface to driver Conn (CL 32136)
database/sql: add context helper methods and transaction types (CL 31258)
database/sql: don't hang if the driver Exec method panics (CL 23576)
database/sql: support returning query database types (CL 29961)
-debug/elf: add sparc64 relocations (CL 30870)
-debug/pe: revert CL 22720 (CL 27212)
encoding/asn1: return error for unexported fields in Marshal, Unmarshal (CL 31540)
-encoding/base64: add Encoding.Strict (CL 24964)
-
-encoding/json: add struct and field name to UnmarshalTypeError message (CL 18692)
-encoding/json: encode nil Marshaler as "null" (CL 31932)
-encoding/json: fix decoding of null into Unmarshaler, TextUnmarshaler (CL 30944)
-encoding/json: marshal the RawMessage value type the same as its pointer type (CL 21811)
-encoding/json: use standard ES6 formatting for numbers during marshal (CL 30371)
-
-encoding/pem: be stricter about the ending line (CL 27391)
-
encoding/xml: add wildcard support for collecting all attributes (CL 30946)
encoding/xml: prevent omitempty from omitting non-nil pointers to empty values (CL 15684)
-flag: arrange for FlagSet.Usage to be non-nil by default (CL 31576)
fmt: document and adjust Scanf space handling to eliminate a few paradoxes (CL 30611)
go/build: allow % in ${SRCDIR} expansion for Jenkins (CL 31611)
go/build: do not record go:binary-only-package if build tags not satisfied (CL 31577)
go/build: implement default GOPATH (CL 32019)
+
go/doc: add IsPredeclared function (CL 29870)
go/doc: allow ToHTML to properly handle URLs containing semicolons (CL 25385)
-go/internal/gcimporter: fail gracefully on export format skew (CL 27816)
+
go/printer: don't drop required semi/linebreak after /*-comment (CL 33016)
go/token: fix race in FileSet.PositionFor. (CL 25345)
go/types: expose Default function, which converts untyped T to T (CL 30715)
internal/trace: fix analysis of EvGoWaiting/EvGoInSyscall events (CL 25572)
-lib/time: update tzdata to 2016i (CL 33029)
-math/big: Rat.SetString to report error if input is not consumed entirely (CL 30472)
math/big: add (*Int).Sqrt (CL 30706)
math/big: implement Float.Scan, type assert fmt interfaces to enforce docs (CL 30723)
math/big: support negative numbers in ModInverse (CL 29299)
-math/big: test and optimize Exp(2, y, n) for large y, odd n (CL 30708)
mime: preserve unnecessary backslash escapes as literals (CL 32175)
-net/http, net/http/httptest: make http2's TrailerPrefix work for http1 (CL 32479)
net/http/httptest: fill ContentLength in recorded Response (CL 28302)
net/http/httptrace: add ClientTrace.TLSHandshakeStart & TLSHandshakeDone (CL 30359)
net/http/httputil: add ModifyResponse to reverseProxy (CL 32356)
net/http/httputil: remove custom hop-by-hop headers from response in ReverseProxy (CL 28810)
net/http/httputil: remove proxied headers mentioned in connection-tokens (CL 27970)
+net/http, net/http/httptest: make http2's TrailerPrefix work for http1 (CL 32479)
net/http: add ErrAbortHandler, make Server quiet if used as panic value (CL 33099)
net/http: add NoBody, don't return nil from NewRequest on zero bodies (CL 31726)
net/http: add Request.GetBody func for 307/308 redirects (CL 31733)
net/http: add Server.Close & Server.Shutdown for forced & graceful shutdown (CL 32329)
net/http: add Server.ReadHeaderTimeout, IdleTimeout, document WriteTimeout (CL 32024)
net/http: add Transport.ProxyConnectHeader to control headers to proxies (CL 32481)
-net/http: add an interface for HTTP/2 server push (CL 32012)
net/http: allow Handlers to test Hijacked conn without spamming error log (CL 30812)
net/http: don't sniff Request.Body on 100-continue requests in Transport (CL 30151)
net/http: handle 3xx redirects properly (CL 29852)
net: add (*UnixListener).SetUnlinkOnClose (CL 32099)
net: add Buffers type, do writev on unix (CL 29951)
+ net: implement Buffers on windows (CL 32371)
net: add Resolver type, Dialer.Resolver, and DefaultResolver (CL 29440)
net: apply tcp4/tcp6 restrictions to literals in ResolveTCPAddr (CL 32100)
net: break up >1GB reads and writes on stream connections (CL 31584)
net: bring domain name length checks into RFC compliance (CL 31722)
net: fix Dial(":80") on Windows (CL 32101)
-net: implement Buffers on windows (CL 32371)
net: implement network interface API for Solaris (CL 29892)
-net: make LookupPort and lookupProtocol work on nacl (CL 28951)
net: only remove Unix domain socket file on the first call to Close (CL 32098)
net: remove parsing of negative decimals in IPv4 literal (CL 28414)
net: respect resolv.conf rotate option (CL 29233)
os: don't let File.Readdir return an empty slice and nil error (CL 28056)
os: make IsExist report true on ERROR_DIR_NOT_EMPTY on Windows (CL 29753)
os: make Windows readConsole handle input and output correctly (CL 29493)
-os: prevent infinite symlink loop of Stat on Windows (CL 27580)
os: reject Rename("old", "new") where new is a directory (CL 31358)
-os: use GetConsoleCP() instead of GetACP() (CL 27575)
os: use extended-length paths on Windows when possible (CL 32451)
path/filepath: don't return SkipDir at top (CL 24780)
bytes: improve performance for bytes.Compare on ppc64x (CL 30949)
bytes: make IndexRune faster (CL 28537)
cmd/asm, go/build: invoke cmd/asm only once per package (CL 27636)
+cmd/compile: do more type conversion inline (CL 32313)
+cmd/compile: inline convI2E (CL 31260)
cmd/compile, cmd/link: more efficient typelink generation (CL 31772)
cmd/compile, cmd/link: stop generating unused go.string.hdr symbols. (CL 31030)
cmd/compile,runtime: redo how map assignments work (CL 30815)
encoding/csv: avoid allocations when reading records (CL 24723)
encoding/hex: change lookup table from string to array (CL 27254)
encoding/json: Use a lookup table for safe characters (CL 24466)
-hash/crc32: improve the AMD64 implementation using SSE4.2 (CL 24471)
-hash/crc32: improve the AMD64 implementation using SSE4.2 (CL 27931)
+hash/crc32: improve the AMD64 implementation using SSE4.2 (CL 24471, CL 27931)
hash/crc32: improve the processing of the last bytes in the SSE4.2 code for AMD64 (CL 24470)
image/color: improve speed of RGBA methods (CL 31773)
image/draw: optimize drawFillOver as drawFillSrc for opaque fills (CL 28790)
math/big: 10%-20% faster float->decimal conversion (CL 31250, CL 31275)
math/big: avoid allocation in float.{Add, Sub} when there's no aliasing (CL 23568)
math/big: make division faster (CL 30613)
+math/big: test and optimize Exp(2, y, n) for large y, odd n (CL 30708)
math/big: use array instead of slice for deBruijn lookups (CL 26663)
math/big: uses SIMD for some math big functions on s390x (CL 32211)
math: speed up Gamma(+Inf) (CL 31370)
regexp: avoid alloc in QuoteMeta when not quoting (CL 31395)
regexp: reduce mallocs in Regexp.Find* and Regexp.ReplaceAll* (CL 23030)
runtime: cgo calls are about 100ns faster (CL 29656, CL 30080)
-runtime: defer is now 2X faster (CL 29656)
runtime: implement getcallersp in Go (CL 29655)
runtime: improve memmove for amd64 (CL 22515, CL 29590)
runtime: increase malloc size classes (CL 24493)
runtime: make assists perform root jobs (CL 32432)
runtime: memclr perf improvements on ppc64x (CL 30373)
runtime: minor string/rune optimizations (CL 27460)
-runtime: optimize defer code (CL 29656)
runtime: remove a load and shift from scanobject (CL 22712)
runtime: remove defer from standard cgo call (CL 30080)
runtime: speed up StartTrace with lots of blocked goroutines (CL 25573)
Probably omit: (too minor, or just bug fixes)
all: freeze net/rpc and reword the 'frozen' message in other frozen packages (CL 32112)
+archive/tar: fix and cleanup readOldGNUSparseMap (CL 28471)
+archive/tar: fix parsePAX to be POSIX.1-2001 compliant (CL 31440)
+archive/tar: fix parsePAXTime (CL 31441)
+archive/tar: make Reader handle GNU format properly (CL 31444)
+archive/tar: reapply Header.Size to regFileReader after merging (CL 28418)
+archive/tar: validate sparse headers in parsePAX (CL 31439)
+archive/zip: handle mtime in NTFS/UNIX/ExtendedTS extra fields (CL 18274)
+archive/zip: only use Extended Timestamp on non-zero MS-DOS timestamps (CL 30811)
+cmd/compile: add go:notinheap type pragma (CL 30939)
+cmd/compile: fail gracefully on export format skew (CL 27814)
+cmd/compile: remove support for textual export format (CL 27171)
cmd/gofmt: don't eat source if -w fails (CL 33018)
+compress/gzip, compress/zlib: add HuffmanOnly as compression levels. (CL 31186)
+crypto/rsa: ensure that generating toy RSA keys doesn't loop (CL 28969)
+debug/elf: add sparc64 relocations (CL 30870)
+flag: arrange for FlagSet.Usage to be non-nil by default (CL 31576)
+go/internal/gcimporter: fail gracefully on export format skew (CL 27816)
image/color: tweak the formula for converting to gray. (CL 31538)
io: fix infinite loop bug in MultiReader (CL 27397)
io: make MultiReader nil exhausted Readers for earlier GC (CL 28533)
+math/big: Rat.SetString to report error if input is not consumed entirely (CL 30472)
math/cmplx: prevent infinite loop in tanSeries (CL 31952)
math: fix Gamma(-171.5) on all platforms (CL 30540)
net/http/internal: don't block unnecessarily in ChunkedReader (CL 31329)
+net: make LookupPort and lookupProtocol work on nacl (CL 28951)
+os: prevent infinite symlink loop of Stat on Windows (CL 27580)
+os: use GetConsoleCP() instead of GetACP() (CL 27575)
reflect: fix DeepEqual for some cyclic corner cases (CL 31588)
runtime/race: don't crash on invalid PCs (CL 29714)
spec: update language on type switches to match implementations (CL 27356)
all: many more examples in documentations (many CLs)
all: plugin build mode & package (many CLs)
+cmd/compile: add SSA backend for s390x and enable by default (CL 28978)
cmd/compile: args no longer live until end of function - use runtime.KeepAlive instead (CL 28310)
cmd/compile: make ssa compilation unconditional (CL 29155)
cmd/compile: remove old lexer and parser (CL 32020)
cmd/doc: ensure summaries truly are only one line (CL 25420)
cmd/doc: perform type grouping for constants and variables (CL 25419)
cmd/doc: show documentation for interface methods when requested explicitly (CL 31852)
+compress/flate: always return uncompressed data in the event of error (CL 28216)
+compress/flate: level 1 (best speed) match across blocks (CL 31640)
+compress/flate: make compression level 0 consistent (CL 31174)
+compress/flate: tighten the BestSpeed max match offset bound. (CL 32149)
+compress/gzip: only encode MTIME if it is valid (CL 32325)
context: make DeadlineExceeded implement net.Error (CL 30370)
+debug/pe: revert CL 22720 (CL 27212)
+encoding/base64: add Encoding.Strict (CL 24964)
encoding/binary: add bool support (CL 28514)
+encoding/json: add struct and field name to UnmarshalTypeError message (CL 18692)
+encoding/json: encode nil Marshaler as "null" (CL 31932)
+encoding/json: fix decoding of null into Unmarshaler, TextUnmarshaler (CL 30944)
+encoding/json: marshal the RawMessage value type the same as its pointer type (CL 21811)
+encoding/json: use standard ES6 formatting for numbers during marshal (CL 30371)
+encoding/pem: be stricter about the ending line (CL 27391)
expvar: add Value methods (CL 30917)
expvar: export http.Handler (CL 24722)
image/png: implement grayscale transparency. (CL 32143)
image/png: implement truecolor transparency. (CL 32140)
image/png: improve compression by skipping filter for paletted images (CL 29872)
+lib/time: update tzdata to 2016i (CL 33029)
math/rand: add Rand.Uint64 (CL 27253)
mime/quotedprintable: accept = not followed by 2 hex digits as literal equals (CL 32174)
mime/quotedprintable: accept trailing soft line-break at the end of message (CL 27530)
+net/http: add an interface for HTTP/2 server push (CL 32012)
net/mail: allow empty quoted string name in address again (CL 32176)
net/mail: expose ParseDate, for use parsing Resent-Date headers (CL 31581)
net/smtp: make Client.Auth trim final space if Auth.Start toServer is empty (CL 33143)
reflect: add Swapper func (CL 30088)
reflect: ignore struct tags when converting structs (CL 30191)
runtime: Hybrid barrier. <100us GC pauses.
+runtime: defer is now 2X faster (CL 29656)
+runtime: optimize defer code (CL 29656)
runtime: runtime.MemStats has much more detailed documentation (CL 28972)
sort: add Slice, SliceStable, and SliceIsSorted (CL 27321)
spec: ignore struct tags when converting structs (CL 24190)