From: Bryan C. Mills <bcmills@google.com>
Date: Tue, 14 Feb 2017 22:06:57 +0000 (-0500)
Subject: mime: add benchmarks for TypeByExtension and ExtensionsByType
X-Git-Tag: go1.9beta1~1559
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=eebd8f51e8f358575bb5fe2867c96a8fe4605ca7;p=gostls13.git

mime: add benchmarks for TypeByExtension and ExtensionsByType

These are possible use-cases for sync.Map.

Updates golang/go#18177

Change-Id: I5e2a3d1249967c37d3f89a41122bf4a90522db11
Reviewed-on: https://go-review.googlesource.com/36964
Reviewed-by: Ian Lance Taylor <iant@golang.org>
---

diff --git a/src/mime/type_test.go b/src/mime/type_test.go
index c6c1491a98..e7aef9a196 100644
--- a/src/mime/type_test.go
+++ b/src/mime/type_test.go
@@ -148,3 +148,43 @@ func TestLookupMallocs(t *testing.T) {
 		t.Errorf("allocs = %v; want 0", n)
 	}
 }
+
+func BenchmarkTypeByExtension(b *testing.B) {
+	initMime()
+	b.ResetTimer()
+
+	for _, ext := range []string{
+		".html",
+		".HTML",
+		".unused",
+	} {
+		b.Run(ext, func(b *testing.B) {
+			b.RunParallel(func(pb *testing.PB) {
+				for pb.Next() {
+					TypeByExtension(ext)
+				}
+			})
+		})
+	}
+}
+
+func BenchmarkExtensionsByType(b *testing.B) {
+	initMime()
+	b.ResetTimer()
+
+	for _, typ := range []string{
+		"text/html",
+		"text/html; charset=utf-8",
+		"application/octet-stream",
+	} {
+		b.Run(typ, func(b *testing.B) {
+			b.RunParallel(func(pb *testing.PB) {
+				for pb.Next() {
+					if _, err := ExtensionsByType(typ); err != nil {
+						b.Fatal(err)
+					}
+				}
+			})
+		})
+	}
+}