benchconsts.go

package main

import (
	"testing"
)

const (
	foo = "bar"
)

var escape interface{}

func BenchmarkConstantDefined(b *testing.B) {
	for i := 0; i < b.N; i++ {
		escape = hello(foo)
	}
}

func BenchmarkConstantLiteral(b *testing.B) {
	for i := 0; i < b.N; i++ {
		escape = hello("bar")
	}
}

func BenchmarkVar(b *testing.B) {
	for i := 0; i < b.N; i++ {
		foo := "bar"
		escape = hello(foo)
	}
}

func hello(s string) string {
	return "world, " + s
}