package imageutils import ( "image" "image/png" "io" "testing" ) func BenchmarkConcat(b *testing.B) { var instance image.Image = image.NewRGBA(image.Rect(0, 0, 0, 0)) pixel := SinglePixel{} for i := 0; i < b.N; i++ { instance = Concat(instance, pixel, Right) } err := png.Encode( io.Discard, instance, ) if err != nil { panic(err) } }