mirror of
https://github.com/golang/go
synced 2024-11-27 04:52:17 -07:00
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package go1
|
|
|
|
import (
|
|
"math/rand"
|
|
"regexp"
|
|
"testing"
|
|
)
|
|
|
|
// benchmark based on regexp/exec_test.go
|
|
|
|
var regexpText []byte
|
|
|
|
func makeRegexpText(n int) []byte {
|
|
rand.Seed(0) // For reproducibility.
|
|
if len(regexpText) >= n {
|
|
return regexpText[:n]
|
|
}
|
|
regexpText = make([]byte, n)
|
|
for i := range regexpText {
|
|
if rand.Intn(30) == 0 {
|
|
regexpText[i] = '\n'
|
|
} else {
|
|
regexpText[i] = byte(rand.Intn(0x7E+1-0x20) + 0x20)
|
|
}
|
|
}
|
|
return regexpText
|
|
}
|
|
|
|
func benchmark(b *testing.B, re string, n int) {
|
|
r := regexp.MustCompile(re)
|
|
t := makeRegexpText(n)
|
|
b.ResetTimer()
|
|
b.SetBytes(int64(n))
|
|
for i := 0; i < b.N; i++ {
|
|
if r.Match(t) {
|
|
b.Fatal("match!")
|
|
}
|
|
}
|
|
}
|
|
|
|
const (
|
|
easy0 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
|
|
easy1 = "A[AB]B[BC]C[CD]D[DE]E[EF]F[FG]G[GH]H[HI]I[IJ]J$"
|
|
medium = "[XYZ]ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
|
|
hard = "[ -~]*ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
|
|
)
|
|
|
|
func BenchmarkRegexpMatchEasy0_32(b *testing.B) { benchmark(b, easy0, 32<<0) }
|
|
func BenchmarkRegexpMatchEasy0_1K(b *testing.B) { benchmark(b, easy0, 1<<10) }
|
|
func BenchmarkRegexpMatchEasy1_32(b *testing.B) { benchmark(b, easy1, 32<<0) }
|
|
func BenchmarkRegexpMatchEasy1_1K(b *testing.B) { benchmark(b, easy1, 1<<10) }
|
|
func BenchmarkRegexpMatchMedium_32(b *testing.B) { benchmark(b, medium, 1<<0) }
|
|
func BenchmarkRegexpMatchMedium_1K(b *testing.B) { benchmark(b, medium, 1<<10) }
|
|
func BenchmarkRegexpMatchHard_32(b *testing.B) { benchmark(b, hard, 32<<0) }
|
|
func BenchmarkRegexpMatchHard_1K(b *testing.B) { benchmark(b, hard, 1<<10) }
|