Go语言整数值转字符串的效率问题

package test

import (
	"fmt"
	"strconv"
	"testing"
)

func BenchmarkSprintf(b *testing.B) {
	number := 10

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		fmt.Sprintf("%d", number)
	}
}

func BenchmarkFormat(b *testing.B) {
	number := int64(10)

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		strconv.FormatInt(number, 10)
	}
}

func BenchmarkItoa(b *testing.B) {
	number := 10

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		strconv.Itoa(number)
	}
}

# ls
test_test.go
# go test -v -run="none" -bench=. -benchtime="3s" -benchmem
goos: darwin
goarch: amd64
BenchmarkSprintf-12    	50000000	        79.5 ns/op	      16 B/op	       2 allocs/op
BenchmarkFormat-12     	2000000000	         2.75 ns/op	       0 B/op	       0 allocs/op
BenchmarkItoa-12       	2000000000	         2.65 ns/op	       0 B/op	       0 allocs/op
PASS
ok  	_/tmp/test	15.408s