json serialization benchmark

json_test.go

package main

import (
	"encoding/json"
	"testing"
)

func BenchmarkMapNakedInterface(b *testing.B) {
	m := map[string]interface{}{
		"col1": "val1",
		"col2": "val2",
		"col3": "val3",
		"col4": "val4",
		"col5": "val5",
		"col6": "val6",
		"col7": "val4",
		"col8": "val5",
		"col9": "val6",
	}

	for n := 0; n < b.N; n++ {
		_, err := json.Marshal(m)
		if err != nil {
			b.Fatalf("err:%v", err)
		}
	}
}

func BenchmarkMapString(b *testing.B) {
	m := map[string]string{
		"col1": "val1",
		"col2": "val2",
		"col3": "val3",
		"col4": "val4",
		"col5": "val5",
		"col6": "val6",
		"col7": "val4",
		"col8": "val5",
		"col9": "val6",
	}

	for n := 0; n < b.N; n++ {
		_, err := json.Marshal(m)
		if err != nil {
			b.Fatalf("err:%v", err)
		}
	}
}

type data struct {
	Col1 string
	Col2 string
	Col3 string
	Col4 string
	Col5 string
	Col6 string
	Col7 string
	Col8 string
	Col9 string
}

func BenchmarkStruct(b *testing.B) {
	d := data{
		Col1: "val1",
		Col2: "val2",
		Col3: "val3",
		Col4: "val4",
		Col5: "val5",
		Col6: "val6",
		Col7: "val4",
		Col8: "val5",
		Col9: "val6",
	}

	for n := 0; n < b.N; n++ {
		_, err := json.Marshal(d)
		if err != nil {
			b.Fatalf("err:%v", err)
		}
	}
}

$ go test -bench .
goos: darwin
goarch: amd64
pkg: github.com/iwanbk/playground/golang/interface
BenchmarkMapNakedInterface-4      200000              5774 ns/op
BenchmarkMapString-4              300000              4888 ns/op
BenchmarkStruct-4                1000000              1529 ns/op
PASS
ok      github.com/iwanbk/playground/golang/interface   4.291s