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string_test.go
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package main
import (
"fmt"
"strings"
"testing"
"unsafe"
)
func BenchmarkString01(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = string01(bar)
}
}
func BenchmarkString02(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = fmt.Sprintf("%s %v", bar.ID, bar.Addr)
}
}
func b2s(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}
func BenchmarkString03(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
b := make([]byte, 0, 40)
b = append(b, bar.ID...)
b = append(b, ' ')
b = append(b, bar.Addr...)
_ = b2s(b)
}
}
func BenchmarkString04(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
var b strings.Builder
b.WriteString(bar.ID)
b.WriteString(" ")
b.WriteString(bar.Addr)
_ = b.String()
}
}
func BenchmarkString05(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
var b strings.Builder
for i := 0; i < len(bar.ID); i++ {
c := bar.ID[i]
b.WriteByte(c)
}
b.WriteByte(' ')
for i := 0; i < len(bar.Addr); i++ {
c := bar.ID[i]
b.WriteByte(c)
}
_ = b.String()
}
}