a few utf8 benchmarks. on my mac:

utf8_test.BenchmarkRuneCountTenASCIIChars	20000000	       108 ns/op
utf8_test.BenchmarkRuneCountTenJapaneseChars	10000000	       199 ns/op
utf8_test.BenchmarkEncodeASCIIRune	500000000	         6 ns/op
utf8_test.BenchmarkEncodeJapaneseRune	100000000	        10 ns/op
utf8_test.BenchmarkDecodeASCIIRune	100000000	        13 ns/op
utf8_test.BenchmarkDecodeJapaneseRune	100000000	        21 ns/op

R=gri
CC=golang-dev
https://golang.org/cl/161049

diff --git a/src/pkg/utf8/utf8_test.go b/src/pkg/utf8/utf8_test.go
index 980a74b02d01f0b2972c55c807017440893e44a9..8dd3ad25f7c5dae71a246f84eb7d2758fdb839a2 100644 (file)
--- a/src/pkg/utf8/utf8_test.go
+++ b/src/pkg/utf8/utf8_test.go
@@ -167,3 +167,43 @@ func TestRuneCount(t *testing.T) {
                }
        }
 }
+
+func BenchmarkRuneCountTenASCIIChars(b *testing.B) {
+       for i := 0; i < b.N; i++ {
+               RuneCountInString("0123456789")
+       }
+}
+
+func BenchmarkRuneCountTenJapaneseChars(b *testing.B) {
+       for i := 0; i < b.N; i++ {
+               RuneCountInString("日本語日本語日本語日")
+       }
+}
+
+func BenchmarkEncodeASCIIRune(b *testing.B) {
+       buf := make([]byte, UTFMax);
+       for i := 0; i < b.N; i++ {
+               EncodeRune('a', buf)
+       }
+}
+
+func BenchmarkEncodeJapaneseRune(b *testing.B) {
+       buf := make([]byte, UTFMax);
+       for i := 0; i < b.N; i++ {
+               EncodeRune('本', buf)
+       }
+}
+
+func BenchmarkDecodeASCIIRune(b *testing.B) {
+       a := []byte{'a'};
+       for i := 0; i < b.N; i++ {
+               DecodeRune(a)
+       }
+}
+
+func BenchmarkDecodeJapaneseRune(b *testing.B) {
+       nihon := strings.Bytes("本");
+       for i := 0; i < b.N; i++ {
+               DecodeRune(nihon)
+       }
+}