Benchmark channel usage with struct values vs struct references

channel_v_vs_r_test.go

package play

import "testing"

type (
	aDataType struct {
		A string
		B int
		C []byte
	}
)

func channelViaValue() {
	c := make(chan aDataType)
	go func() {
		defer close(c)
		for i := 0; i < 100000; i++ {
			c <- aDataType{"A", i, []byte{'C'}}
		}
	}()
	for range c {
	}
}

func channelViaRef() {
	c := make(chan *aDataType)
	go func() {
		defer close(c)
		for i := 0; i < 100000; i++ {
			c <- &aDataType{"A", i, []byte{'C'}}
		}
	}()
	for range c {
	}
}

func BenchmarkChannelViaValue(b *testing.B) {
	for n := 0; n < b.N; n++ {
		channelViaValue()
	}
}

func BenchmarkChannelViaRef(b *testing.B) {
	for n := 0; n < b.N; n++ {
		channelViaRef()
	}
}

gistfile1.txt

$ go test -bench=. -benchtime=10s                                                                                        ⛅ !EXPIRED! s24-image-scaling 
goos: linux
goarch: amd64
pkg: github.com/Scout24/image-delivery-architecture-review/src/play
BenchmarkChannelViaValue-4   	    1000	  21246004 ns/op
BenchmarkChannelViaRef-4     	     500	  28882823 ns/op
PASS
ok  	github.com/Scout24/image-delivery-architecture-review/src/play	40.609s