go-libwebp

commit 3bdb8c52844faed6a2cef991282bb0a2dfaaca1b
parent 9c8b739f420eb05dfa848dabfe89309d5af9344b
Author: Jack Mordaunt <jackmordaunt.dev@gmail.com>
Date:   Thu,  7 Mar 2024 15:17:13 +0800

webp: benchmark decode

Benchmark stdlib webp vs transpiled vs dynamic.

Signed-off-by: Jack Mordaunt <jackmordaunt.dev@gmail.com>

Diffstat:
M
webp/decode.go
 | 
11
+++++++++++
M
webp/webp_test.go
 | 
31
+++++++++++++++++++++++++++++++

2 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/webp/decode.go b/webp/decode.go
@@ -22,6 +22,17 @@ func Decode(r io.Reader) (image.Image, error) {
 	return transpiled.DecodeImpl(by)
 }
 
+func decodeDynamic(by []byte) (image.Image, error) {
+	if err := dynamic.Init(); err != nil {
+		return nil, err
+	}
+	return dynamic.DecodeImpl(by)
+}
+
+func decodeTranspiled(by []byte) (image.Image, error) {
+	return transpiled.DecodeImpl(by)
+}
+
 // DecodeConfig returns the color model and dimensions of a WEBP image without
 // decoding the entire image.
 func DecodeConfig(r io.Reader) (image.Config, error) {
diff --git a/webp/webp_test.go b/webp/webp_test.go
@@ -48,6 +48,37 @@ func TestLossless(t *testing.T) {
 	})
 }
 
+func BenchmarkDecode(b *testing.B) {
+	b.Run("stdwebp", func(b *testing.B) {
+		for ii := 0; ii < b.N; ii++ {
+			r := bytes.NewReader(goldenOut)
+			m, err := stdwebp.Decode(r)
+			if err != nil {
+				b.Fatalf("error: %v", err)
+			}
+			_ = m
+		}
+	})
+	b.Run("transpiled", func(b *testing.B) {
+		for ii := 0; ii < b.N; ii++ {
+			m, err := decodeTranspiled(goldenOut)
+			if err != nil {
+				b.Fatalf("error: %v", err)
+			}
+			_ = m
+		}
+	})
+	b.Run("dynamic", func(b *testing.B) {
+		for ii := 0; ii < b.N; ii++ {
+			m, err := decodeDynamic(goldenOut)
+			if err != nil {
+				b.Fatalf("error: %v", err)
+			}
+			_ = m
+		}
+	})
+}
+
 func assertOutput(t *testing.T, m image.Image, src io.Reader, decode func(io.Reader) (image.Image, error)) {
 	t.Helper()