decode_test.go

package main

import (
	"encoding/json"
	"io"
	"strings"
	"testing"
)

const benchmarhData = `{
"a": "1",
"b": {"c": {"d": {"e": {"f": "2"}},
		"d2": 22,
		"d3": [{"e3": {"f4":"4"}}, {"e4": 44}]
	}
},
"g": "3"
}`

func BenchmarkJsonDecode(b *testing.B) {
	for i := 0; i < b.N; i++ {
		var v interface{}
		err := json.NewDecoder(strings.NewReader(benchmarhData)).Decode(&v)
		if err != nil {
			b.Fatal(err)
		}
	}
	b.ReportAllocs()
}

func getAllToken(decoder *json.Decoder) {
	for {
		_, err := decoder.Token()
		if err == io.EOF {
			break
		}
		if err != nil {
			panic(err)
		}
	}
}

func BenchmarkGetToken(b *testing.B) {
	for i := 0; i < b.N; i++ {
		getAllToken(json.NewDecoder(strings.NewReader(benchmarhData)))
	}
	b.ReportAllocs()
}