defer benchmark test

count.go

func sum(max int) int {
	total := 0
	for i := 0; i < max; i++ {
		total += i
	}
	return total
}
func fooWithDefer()    { defer func() { sum(10) }() }
func fooWithoutDefer() { sum(10) }
func BenchmarkFooWithDefer(b *testing.B) {
	for i := 0; i < b.N; i++ {
		fooWithDefer()
	}
}
func BenchmarkFooWithoutDefer(b *testing.B) {
	for i := 0; i < b.N; i++ {
		fooWithoutDefer()
	}
}