channel.go

channel.go

package garbage

import "testing"

var i int
func BenchmarkBoolInt(b *testing.B) {
	c := make(chan int, b.N)
	for i := 0; i < b.N; i++ {
		c <- i
	}
	close(c)

	for range c {
		i = <-c
	}
}

var bl bool
func BenchmarkBoolChan(b *testing.B) {
	c := make(chan bool, b.N)
	for i := 0; i < b.N; i++ {
		c <- true
	}
	close(c)

	for range c {
		bl = <-c
	}
}

var s struct{}
func BenchmarkStructChan(b *testing.B) {
	c := make(chan struct{}, b.N)
	for i := 0; i < b.N; i++ {
		c <- struct{}{}
	}
	close(c)

	for range c {
		s = <-c
	}
}

var p *struct{}
func BenchmarkStructPtrChan(b *testing.B) {
	c := make(chan *struct{}, b.N)
	for i := 0; i < b.N; i++ {
		c <- nil
	}
	close(c)

	for range c {
		p = <-c
	}
}

/*
➜  garbage go test -v -bench=Benchmark -test.benchmem -cpu=1,8,16,32
goos: darwin
goarch: amd64
pkg: garbage
BenchmarkBoolInt                30000000                48.4 ns/op             8 B/op          0 allocs/op
BenchmarkBoolInt-8              30000000                48.8 ns/op             8 B/op          0 allocs/op
BenchmarkBoolInt-16             30000000                46.3 ns/op             8 B/op          0 allocs/op
BenchmarkBoolInt-32             30000000                44.6 ns/op             8 B/op          0 allocs/op
BenchmarkBoolChan               30000000                43.4 ns/op             1 B/op          0 allocs/op
BenchmarkBoolChan-8             30000000                43.1 ns/op             1 B/op          0 allocs/op
BenchmarkBoolChan-16            30000000                42.9 ns/op             1 B/op          0 allocs/op
BenchmarkBoolChan-32            30000000                44.3 ns/op             1 B/op          0 allocs/op
BenchmarkStructChan             30000000                44.7 ns/op             0 B/op          0 allocs/op
BenchmarkStructChan-8           30000000                43.3 ns/op             0 B/op          0 allocs/op
BenchmarkStructChan-16          30000000                44.9 ns/op             0 B/op          0 allocs/op
BenchmarkStructChan-32          30000000                43.3 ns/op             0 B/op          0 allocs/op
BenchmarkStructPtrChan          20000000                53.7 ns/op             8 B/op          0 allocs/op
BenchmarkStructPtrChan-8        30000000                51.0 ns/op             8 B/op          0 allocs/op
BenchmarkStructPtrChan-16       30000000                51.6 ns/op             8 B/op          0 allocs/op
BenchmarkStructPtrChan-32       30000000                51.1 ns/op             8 B/op          0 allocs/op
*/