Go Reflect Performance

reflect_performance.go

package main

import (
    "fmt"
    "time"
    "reflect"
)

func TestReflect(a int64) {
    var i int64
    for i = 0; i < 10000; i++ {
        a += i
    }
}

func main() {
    var i int64
    start := time.Now().UnixNano()

    for i = 0; i < 10000; i++ {
        TestReflect(i)
    }

    end := time.Now().UnixNano()

    fmt.Println("native function performance", end - start)

    m := map[string]func(int64){
        "TestFunc": TestReflect,
    }

    start = time.Now().UnixNano()

    for i = 0; i < 10000; i++ {
        r := reflect.ValueOf(m["TestFunc"])
        r.Call([]reflect.Value{reflect.ValueOf(i)})
    }

    end = time.Now().UnixNano()

    fmt.Println("reflect function performance", end - start)
}
// go 1.5
//native function performance 55052600
//reflect function performance 55056300