extend gif benchmarks

Author: antonfirsov

tests/ImageSharp.Benchmarks/Codecs/Gif/DecodeEncodeGif.cs

@@ -0,0 +1,59 @@
+// Copyright (c) Six Labors.
+// Licensed under the Six Labors Split License.
+
+using System.Drawing.Imaging;
+using BenchmarkDotNet.Attributes;
+using SixLabors.ImageSharp.Formats.Gif;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Quantization;
+using SixLabors.ImageSharp.Tests;
+using SDImage = System.Drawing.Image;
+
+namespace SixLabors.ImageSharp.Benchmarks.Codecs;
+
+public abstract class DecodeEncodeGif
+{
+    private Stream outputStream;
+
+    protected abstract GifEncoder Encoder { get; }
+
+    [Params(TestImages.Gif.Leo, TestImages.Gif.Cheers)]
+    public string TestImage { get; set; }
+
+    private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
+
+    [GlobalSetup]
+    public void Setup() => this.outputStream = new MemoryStream();
+
+    [GlobalCleanup]
+    public void Cleanup() => this.outputStream.Close();
+
+    [Benchmark(Baseline = true)]
+    public void SystemDrawing()
+    {
+        this.outputStream.Position = 0;
+        using SDImage image = SDImage.FromFile(this.TestImageFullPath);
+        image.Save(this.outputStream, ImageFormat.Gif);
+    }
+
+    [Benchmark]
+    public void ImageSharp()
+    {
+        this.outputStream.Position = 0;
+        using Image image = Image.Load(this.TestImageFullPath);
+        image.SaveAsGif(this.outputStream, this.Encoder);
+    }
+}
+
+public class DecodeEncodeGif_DefaultEncoder : DecodeEncodeGif
+{
+    protected override GifEncoder Encoder => new();
+}
+
+public class DecodeEncodeGif_CoarsePaletteEncoder : DecodeEncodeGif
+{
+    protected override GifEncoder Encoder => new()
+    {
+        Quantizer = new WebSafePaletteQuantizer(new QuantizerOptions { Dither = KnownDitherings.Bayer4x4, ColorMatchingMode = ColorMatchingMode.Coarse })
+    };
+}

tests/ImageSharp.Benchmarks/Codecs/Gif/EncodeGif.cs

@@ -12,21 +12,16 @@
 
 namespace SixLabors.ImageSharp.Benchmarks.Codecs;
 
-[Config(typeof(Config.ShortMultiFramework))]
-public class EncodeGif
+public abstract class EncodeGif
 {
     // System.Drawing needs this.
     private Stream bmpStream;
     private SDImage bmpDrawing;
     private Image<Rgba32> bmpCore;
 
-    // Try to get as close to System.Drawing's output as possible
-    private readonly GifEncoder encoder = new GifEncoder
-    {
-        Quantizer = new WebSafePaletteQuantizer(new QuantizerOptions { Dither = KnownDitherings.Bayer4x4, ColorMatchingMode = ColorMatchingMode.Coarse })
-    };
+    protected abstract GifEncoder Encoder { get; }
 
-    [Params(TestImages.Bmp.Car, TestImages.Png.Rgb48Bpp)]
+    [Params(TestImages.Gif.Leo, TestImages.Gif.Cheers)]
     public string TestImage { get; set; }
 
     [GlobalSetup]
@@ -61,6 +56,19 @@ public void GifSystemDrawing()
     public void GifImageSharp()
     {
         using var memoryStream = new MemoryStream();
-        this.bmpCore.SaveAsGif(memoryStream, this.encoder);
+        this.bmpCore.SaveAsGif(memoryStream, this.Encoder);
     }
 }
+
+public class EncodeGif_DefaultEncoder : EncodeGif
+{
+    protected override GifEncoder Encoder => new();
+}
+
+public class EncodeGif_CoarsePaletteEncoder : EncodeGif
+{
+    protected override GifEncoder Encoder => new()
+    {
+        Quantizer = new WebSafePaletteQuantizer(new QuantizerOptions { Dither = KnownDitherings.Bayer4x4, ColorMatchingMode = ColorMatchingMode.Coarse })
+    };
+}