Benchmark test echo logger in the same way as uber-bo/zap.

echo_logger_bench_test.go

package log_test

import (
	"io/ioutil"
	"testing"

	"github.com/labstack/gommon/log"
)

func withBenchedLogger(b *testing.B, f func(*log.Logger)) {
	logger := log.New("-")
	logger.SetOutput(ioutil.Discard)

	b.ResetTimer()
	b.RunParallel(func(pb *testing.PB) {
		for pb.Next() {
			f(logger)
		}
	})
}

func BenchmarkInfo(b *testing.B) {
	withBenchedLogger(b, func(l *log.Logger) {
		l.Info("bench")
	})
}

func BenchmarkInfof(b *testing.B) {
	withBenchedLogger(b, func(l *log.Logger) {
		l.Infof("bench %s", "test")
	})
}

// tested on MacBook Pro 2016 16GB Corei7 3.3G 
//
// BenchmarkLog-4            500000              2747 ns/op
// BenchmarkInfo-4           500000              2704 ns/op
// BenchmarkInfof-4          500000              2785 ns/op
// PASS
// ok      github.com/labstack/gommon/log  4.274s