channel benchmark

channel_test.py

package main

import "testing"

func BenchmarkOneByteChannel(b *testing.B) {
	ch := make(chan [1]byte)
	go func() {
		for {
			<-ch
		}
	}()
	for i := 0; i < b.N; i++ {
		ch <- [1]byte{}
	}
}

func BenchmarkTenByteChannel(b *testing.B) {
	ch := make(chan [10]byte)
	go func() {
		for {
			<-ch
		}
	}()
	for i := 0; i < b.N; i++ {
		ch <- [10]byte{}
	}
}

func BenchmarkHundredByteChannel(b *testing.B) {
	ch := make(chan [100]byte)
	go func() {
		for {
			<-ch
		}
	}()
	for i := 0; i < b.N; i++ {
		ch <- [100]byte{}
	}
}

func BenchmarkThousandByteChannel(b *testing.B) {
	ch := make(chan [1000]byte)
	go func() {
		for {
			<-ch
		}
	}()
	for i := 0; i < b.N; i++ {
		ch <- [1000]byte{}
	}
}

† go test -bench='.*' .
goos: darwin
goarch: amd64
pkg: example/channelexample
BenchmarkOneByteChannel-4        	 2932813	       388 ns/op
BenchmarkTenByteChannel-4        	 3090325	       414 ns/op
BenchmarkHundredByteChannel-4    	 3049754	       400 ns/op
BenchmarkThousandByteChannel-4   	 2781367	       415 ns/op
PASS
ok  	example/channelexample	6.471s