Benchmark function calls

funcall.go

package main

import (
        "fmt"
        "testing"
)

func readonly() {}
var readwrite = func() {}

func main() {
        fmt.Printf("readonly:  %s\n", testing.Benchmark(func(b *testing.B) {
                for i := 0; i < b.N; i++ {
                        readonly()
                }
        }))
        fmt.Printf("readwrite: %s\n", testing.Benchmark(func(b *testing.B) {
                for i := 0; i < b.N; i++ {
                        readwrite()
                }
        }))
}