压测 正则 性能分析

main.go

package main

import (
   "fmt"
   "regexp"
   "strings"
)

var path = "http://qq.pinyin.cn/?BizName=a123&BizStatus=b456&Test=qwer"

func Calculate1() (ret string) {
   f := "[?&]{1}BizName=\w{0,}[?&]{1}"
   reg := regexp.MustCompile(f)
   ret = reg.FindString(path)
   ret = strings.Replace(ret, "&", "", -1)
   ret = strings.Replace(ret, "BizName=", "", -1)
   return
}

func Calculate2() (ret string) {
   sli := strings.Split(path, "BizName=")
   ret = sli[1]
   ret = strings.Replace(ret, "&", "", -1)
   return
}

func main() {

   fmt.Println("main")
}

main_test.go

package main

import "testing"

func BenchmarkCalculate1(b *testing.B) {
   for i := 0; i < b.N; i++ {
      Calculate1()
   }
}
func BenchmarkCalculate2(b *testing.B) {
   for i := 0; i < b.N; i++ {
      Calculate2()
   }
}

test@a:~/gokit/tregexp$ go test -bench=.
goos: linux
goarch: amd64
pkg: t
cpu: AMD Ryzen 5 3600 6-Core Processor
BenchmarkCalculate1 283473 3962 ns/op
BenchmarkCalculate2 7610416 165.6 ns/op
PASS
ok t 2.591s
test@a:~/gokit/tregexp$