testencoding_test.go

package main

import (
        "testing"
        "encoding/json"
        "encoding/gob"
        "bytes"
)

// initialisation

type SampleStruct struct {
        A string
        B int
        C float64
        D bool
}

var encValue = SampleStruct{
        "The lazy fox jumps over the lazy dog",
        42,
        13.37,
        true,
}

func init() {
        gob.Register(SampleStruct{})
}

type FakeWriter struct{}

func (FakeWriter) Write([]byte) (int, error) {
        return 0, nil
}

var decodeInto SampleStruct

// gob encoding

var gobEncoder = gob.NewEncoder(FakeWriter{})

func BenchmarkGobEncoding(b *testing.B) {
        for i := 0; i < b.N; i++ {
                gobEncoder.Encode(encValue)
        }
}

// json encoding

var jsonEncoder = json.NewEncoder(FakeWriter{})

func BenchmarkJSONEncoding(b *testing.B) {
        for i := 0; i < b.N; i++ {
                jsonEncoder.Encode(encValue)
        }
}

// gob decoding

var gobReader = bytes.NewReader(gobTestValue)

var gobDecoder = gob.NewDecoder(gobReader)

var gobTestValue = []byte{0x32, 0xff, 0x81, 0x3, 0x1, 0x1, 0xc, 0x53, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x53, 0x74, 0x72, 0x75, 0x63, 0x74, 0x1, 0xff, 0x82, 0x0, 0x1, 0x4, 0x1, 0x1, 0x41, 0x1, 0xc, 
0x0, 0x1, 0x1, 0x42, 0x1, 0x4, 0x0, 0x1, 0x1, 0x43, 0x1, 0x8, 0x0, 0x1, 0x1, 0x44, 0x1, 0x2, 0x0, 0x0, 0x0, 0x11, 0xff, 0x82, 0x1, 0xc, 0x44, 0x65, 0x63, 0x6f, 0x64, 0x65, 0x72, 0x20, 0x74, 
0x65, 0x73, 0x74, 0x0}


func BenchmarkGobDecoding(b *testing.B) {
        for i := 0; i < b.N; i++ {
                gobDecoder.Decode(&decodeInto)
                gobReader.Reset(gobTestValue)
        }
}

// json decoding

var jsonReader = bytes.NewReader(jsonTestValue)

var jsonDecoder = json.NewDecoder(jsonReader)

var jsonTestValue = []byte{0x7b, 0x22, 0x41, 0x22, 0x3a, 0x22, 0x44, 0x65, 0x63, 0x6f, 0x64, 0x65, 0x72, 0x20, 0x74, 0x65, 0x73, 0x74, 0x22, 0x2c, 0x22, 0x42, 0x22, 0x3a, 0x30, 0x2c, 0x22, 0x43, 
0x22, 0x3a, 0x30, 0x2c, 0x22, 0x44, 0x22, 0x3a, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x7d, 0xa}

func BenchmarkJSONDecoding(b *testing.B) {
        for i := 0; i < b.N; i++ {
                jsonDecoder.Decode(&decodeInto)
                jsonReader.Reset(jsonTestValue)
        }
}