Benchmark of two Go funcs template.

gistfile1.go

package main

import "fmt"
import "testing"
import "math/rand"
import "time"

var result bool

func StrCmp(n string) bool {
	return n == ""
}

func LenCmp(n string) bool {
	return len(n) == 0
}

func BenchmarkStrCmp(b *testing.B) {
	var r bool
	str := "Sometimes Empty"
	for i := 0; i < b.N; i++ {
		r = StrCmp(str[0:randInt(0, len(str))])
	}
	result = r
}

func BenchmarkLenCmp(b *testing.B) {
	var r bool
	str := "Sometimes Empty"
	for i := 0; i < b.N; i++ {
		r = LenCmp(str[0:randInt(0, len(str))])
	}
	result = r
}

func randInt(min int, max int) int {
	return min + rand.Intn(max-min)
}

func main() {
	rand.Seed(time.Now().UnixNano())
	fmt.Println(testing.Benchmark(BenchmarkStrCmp))
	fmt.Println(testing.Benchmark(BenchmarkLenCmp))
}

Relevant: http://dave.cheney.net/2013/06/30/how-to-write-benchmarks-in-go