Test golang string concat

str.go

package main

import (
	"bytes"
	"fmt"
	"strings"
)

func main() {

}

func concatSprintf(one, two string) string {
	return fmt.Sprintf("%s%s", one, two)
}

func concatPlus(one, two string) string {
	return one + two
}

func concatBytes(one, two string) string {
	var buf bytes.Buffer

	buf.WriteString(one)
	buf.WriteString(two)
	return buf.String()
}

func concatBuilder(one, two string) string {
	var buf strings.Builder

	buf.WriteString(one)
	buf.WriteString(two)
	return buf.String()
}

str_test.go

package main

import "testing"

func BenchmarkConcatSprintf(b *testing.B) {
	for n := 0; n < b.N; n++ {
		concatSprintf(string(n), string(n+1))
	}
}

func BenchmarkConcatPlus(b *testing.B) {
	for n := 0; n < b.N; n++ {
		concatPlus(string(n), string(n+1))
	}
}

func BenchmarkConcatBytes(b *testing.B) {
	for n := 0; n < b.N; n++ {
		concatBytes(string(n), string(n+1))
	}
}

func BenchmarkConcatBuilder(b *testing.B) {
	for n := 0; n < b.N; n++ {
		concatBuilder(string(n), string(n+1))
	}
}