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76 lines
4.2 KiB
76 lines
4.2 KiB
// Copyright (c) Six Labors.
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// Licensed under the Apache License, Version 2.0.
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using System.IO;
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using BenchmarkDotNet.Attributes;
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using SixLabors.ImageSharp.Formats.Jpeg;
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using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
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using SixLabors.ImageSharp.IO;
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using SixLabors.ImageSharp.Tests;
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using SDSize = System.Drawing.Size;
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namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
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{
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//[Config(typeof(Config.ShortMultiFramework))]
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public class DecodeJpegParseStreamOnly
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{
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[Params(TestImages.Jpeg.BenchmarkSuite.Lake_Small444YCbCr)]
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public string TestImage { get; set; }
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private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
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private byte[] jpegBytes;
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[GlobalSetup]
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public void Setup()
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=> this.jpegBytes = File.ReadAllBytes(this.TestImageFullPath);
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//[Benchmark(Baseline = true, Description = "System.Drawing FULL")]
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//public SDSize JpegSystemDrawing()
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//{
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// using var memoryStream = new MemoryStream(this.jpegBytes);
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// using var image = System.Drawing.Image.FromStream(memoryStream);
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// return image.Size;
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//}
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[Benchmark(Description = "JpegDecoderCore.ParseStream")]
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public void ParseStream()
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{
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using var memoryStream = new MemoryStream(this.jpegBytes);
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using var bufferedStream = new BufferedReadStream(Configuration.Default, memoryStream);
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var decoder = new JpegDecoderCore(Configuration.Default, new JpegDecoder { IgnoreMetadata = true });
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var scanDecoder = new HuffmanScanDecoder(bufferedStream, new NoopSpectralConverter(), cancellationToken: default);
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decoder.ParseStream(bufferedStream, scanDecoder, cancellationToken: default);
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decoder.Dispose();
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}
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// We want to test only stream parsing and scan decoding, we don't need to convert spectral data to actual pixels
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// Nor we need to allocate final pixel buffer
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// Note: this still introduces virtual method call overhead for baseline interleaved images
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// There's no way to eliminate it as spectral conversion is built into the scan decoding loop for memory footprint reduction
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private class NoopSpectralConverter : SpectralConverter
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{
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public override void ConvertStrideBaseline()
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{
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}
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public override void InjectFrameData(JpegFrame frame, IRawJpegData jpegData)
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{
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}
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}
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}
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/*
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| Method | Job | Runtime | TestImage | Mean | Error | StdDev | Ratio | Gen 0 | Gen 1 | Gen 2 | Allocated |
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|---------------------------- |----------- |-------------- |--------------------- |---------:|----------:|----------:|------:|--------:|------:|------:|----------:|
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| 'System.Drawing FULL' | Job-HITJFX | .NET 4.7.2 | Jpg/b(...)e.jpg [21] | 5.828 ms | 0.9885 ms | 0.0542 ms | 1.00 | 46.8750 | - | - | 211566 B |
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| JpegDecoderCore.ParseStream | Job-HITJFX | .NET 4.7.2 | Jpg/b(...)e.jpg [21] | 5.833 ms | 0.2923 ms | 0.0160 ms | 1.00 | - | - | - | 12416 B |
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| | | | | | | | | | | | |
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| 'System.Drawing FULL' | Job-WPSKZD | .NET Core 2.1 | Jpg/b(...)e.jpg [21] | 6.018 ms | 2.1374 ms | 0.1172 ms | 1.00 | 46.8750 | - | - | 210768 B |
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| JpegDecoderCore.ParseStream | Job-WPSKZD | .NET Core 2.1 | Jpg/b(...)e.jpg [21] | 4.382 ms | 0.9009 ms | 0.0494 ms | 0.73 | - | - | - | 12360 B |
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| | | | | | | | | | | | |
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| 'System.Drawing FULL' | Job-ZLSNRP | .NET Core 3.1 | Jpg/b(...)e.jpg [21] | 5.714 ms | 0.4078 ms | 0.0224 ms | 1.00 | - | - | - | 176 B |
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| JpegDecoderCore.ParseStream | Job-ZLSNRP | .NET Core 3.1 | Jpg/b(...)e.jpg [21] | 4.239 ms | 1.0943 ms | 0.0600 ms | 0.74 | - | - | - | 12406 B |
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*/
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}
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