benchmarking who's faster: checking elapsed time (in intervals) with `time.Now().Sub()`, or using a `time.Ticker`

bench_test.go

package main_test

import (
	"time"
	"testing"
)

type TimeNowChecker struct {
	lastTime time.Time
	interval time.Duration
}

func (t *TimeNowChecker) IsElapsed() bool {
	now := time.Now()

	if now.Sub(t.lastTime) > t.interval {
		t.lastTime = now
		return true
	}

	return false
}

type TickerChecker struct {
	ticker *time.Ticker
}

func (t *TickerChecker) IsElapsed() bool {
	select {
	case <-t.ticker.C:
		return true
	default:
	}

	return false
}

const interval = 50 * time.Millisecond

func BenchmarkTimeNow(b *testing.B) {
	checker := TimeNowChecker{
		lastTime: time.Now(),
		interval: interval,
	}

	for n := 0; n < b.N; n++ {
		checker.IsElapsed()
	}
}

func BenchmarkTicker(b *testing.B) {
	checker := TickerChecker{
		ticker: time.NewTicker(interval),
	}

	for n := 0; n < b.N; n++ {
		checker.IsElapsed()
	}
}

run

go test -bench=.
goos: darwin
goarch: amd64
BenchmarkTimeNow-12     15730425                73.0 ns/op
BenchmarkTicker-12      223836266                5.31 ns/op
PASS
ok      _/tmp/bb        2.980s