add benchmark

Author: lEx0

jpeg/jpeg_test.go

@@ -63,6 +63,22 @@ func BenchmarkDecode(b *testing.B) {
 	}
 }
 
+func BenchmarkDecodeCMYK(b *testing.B) {
+	raw, err := ioutil.ReadFile("./../test/images/testdata/video-001.cmyk.jpeg")
+	if err != nil {
+		b.Error("cannot find cmyk image")
+	}
+
+	for i := 0; i < b.N; i++ {
+		img, err := jpeg.Decode(bytes.NewReader(raw), &jpeg.DecoderOptions{})
+		if err != nil {
+			b.Errorf("Got Error: %v", err)
+		} else if img == nil {
+			b.Error("got a nil")
+		}
+	}
+}
+
 func BenchmarkDecodeIntoRGB(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		for _, file := range naturalImageFiles {