// Copyright (c) Six Labors. // Licensed under the Apache License, Version 2.0. using System; using System.IO; using BenchmarkDotNet.Attributes; using SixLabors.ImageSharp.IO; namespace SixLabors.ImageSharp.Benchmarks.IO { [Config(typeof(Config.ShortClr))] public class BufferedStreams { private readonly byte[] buffer = CreateTestBytes(); private readonly byte[] chunk1 = new byte[2]; private readonly byte[] chunk2 = new byte[2]; private MemoryStream stream1; private MemoryStream stream2; private MemoryStream stream3; private MemoryStream stream4; private MemoryStream stream5; private MemoryStream stream6; private BufferedReadStream bufferedStream1; private BufferedReadStream bufferedStream2; private BufferedReadStreamWrapper bufferedStreamWrap1; private BufferedReadStreamWrapper bufferedStreamWrap2; [GlobalSetup] public void CreateStreams() { this.stream1 = new MemoryStream(this.buffer); this.stream2 = new MemoryStream(this.buffer); this.stream3 = new MemoryStream(this.buffer); this.stream4 = new MemoryStream(this.buffer); this.stream5 = new MemoryStream(this.buffer); this.stream6 = new MemoryStream(this.buffer); this.bufferedStream1 = new BufferedReadStream(this.stream3); this.bufferedStream2 = new BufferedReadStream(this.stream4); this.bufferedStreamWrap1 = new BufferedReadStreamWrapper(this.stream5); this.bufferedStreamWrap2 = new BufferedReadStreamWrapper(this.stream6); } [GlobalCleanup] public void DestroyStreams() { this.bufferedStream1?.Dispose(); this.bufferedStream2?.Dispose(); this.bufferedStreamWrap1?.Dispose(); this.bufferedStreamWrap2?.Dispose(); this.stream1?.Dispose(); this.stream2?.Dispose(); this.stream3?.Dispose(); this.stream4?.Dispose(); this.stream5?.Dispose(); this.stream6?.Dispose(); } [Benchmark] public int StandardStreamRead() { int r = 0; Stream stream = this.stream1; byte[] b = this.chunk1; for (int i = 0; i < stream.Length / 2; i++) { r += stream.Read(b, 0, 2); } return r; } [Benchmark] public int BufferedReadStreamRead() { int r = 0; BufferedReadStream reader = this.bufferedStream1; byte[] b = this.chunk2; for (int i = 0; i < reader.Length / 2; i++) { r += reader.Read(b, 0, 2); } return r; } [Benchmark] public int BufferedReadStreamWrapRead() { int r = 0; BufferedReadStreamWrapper reader = this.bufferedStreamWrap1; byte[] b = this.chunk2; for (int i = 0; i < reader.Length / 2; i++) { r += reader.Read(b, 0, 2); } return r; } [Benchmark(Baseline = true)] public int StandardStreamReadByte() { int r = 0; Stream stream = this.stream2; for (int i = 0; i < stream.Length; i++) { r += stream.ReadByte(); } return r; } [Benchmark] public int BufferedReadStreamReadByte() { int r = 0; BufferedReadStream reader = this.bufferedStream2; for (int i = 0; i < reader.Length; i++) { r += reader.ReadByte(); } return r; } [Benchmark] public int BufferedReadStreamWrapReadByte() { int r = 0; BufferedReadStreamWrapper reader = this.bufferedStreamWrap2; for (int i = 0; i < reader.Length; i++) { r += reader.ReadByte(); } return r; } [Benchmark] public int ArrayReadByte() { byte[] b = this.buffer; int r = 0; for (int i = 0; i < b.Length; i++) { r += b[i]; } return r; } private static byte[] CreateTestBytes() { var buffer = new byte[BufferedReadStream.BufferLength * 3]; var random = new Random(); random.NextBytes(buffer); return buffer; } } /* BenchmarkDotNet=v0.12.0, OS=Windows 10.0.19041 Intel Core i7-8650U CPU 1.90GHz (Kaby Lake R), 1 CPU, 8 logical and 4 physical cores .NET Core SDK=3.1.301 [Host] : .NET Core 3.1.5 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.27001), X64 RyuJIT Job-LKLBOT : .NET Framework 4.8 (4.8.4180.0), X64 RyuJIT Job-RSTMKF : .NET Core 2.1.19 (CoreCLR 4.6.28928.01, CoreFX 4.6.28928.04), X64 RyuJIT Job-PZIHIV : .NET Core 3.1.5 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.27001), X64 RyuJIT IterationCount=3 LaunchCount=1 WarmupCount=3 | Method | Runtime | Mean | Error | StdDev | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated | |------------------------------- |-------------- |----------:|-----------:|----------:|------:|--------:|------:|------:|------:|----------:| | StandardStreamRead | .NET 4.7.2 | 126.07 us | 126.498 us | 6.934 us | 0.99 | 0.08 | - | - | - | - | | BufferedReadStreamRead | .NET 4.7.2 | 118.08 us | 42.234 us | 2.315 us | 0.92 | 0.03 | - | - | - | - | | BufferedReadStreamWrapRead | .NET 4.7.2 | 45.33 us | 22.833 us | 1.252 us | 0.35 | 0.00 | - | - | - | - | | StandardStreamReadByte | .NET 4.7.2 | 128.17 us | 94.616 us | 5.186 us | 1.00 | 0.00 | - | - | - | - | | BufferedReadStreamReadByte | .NET 4.7.2 | 143.60 us | 92.871 us | 5.091 us | 1.12 | 0.08 | - | - | - | - | | BufferedReadStreamWrapReadByte | .NET 4.7.2 | 32.72 us | 53.708 us | 2.944 us | 0.26 | 0.02 | - | - | - | - | | ArrayReadByte | .NET 4.7.2 | 19.40 us | 12.206 us | 0.669 us | 0.15 | 0.01 | - | - | - | - | | | | | | | | | | | | | | StandardStreamRead | .NET Core 2.1 | 84.82 us | 55.983 us | 3.069 us | 0.75 | 0.15 | - | - | - | - | | BufferedReadStreamRead | .NET Core 2.1 | 49.62 us | 27.253 us | 1.494 us | 0.44 | 0.08 | - | - | - | - | | BufferedReadStreamWrapRead | .NET Core 2.1 | 67.78 us | 87.546 us | 4.799 us | 0.60 | 0.10 | - | - | - | - | | StandardStreamReadByte | .NET Core 2.1 | 115.81 us | 382.107 us | 20.945 us | 1.00 | 0.00 | - | - | - | - | | BufferedReadStreamReadByte | .NET Core 2.1 | 16.32 us | 6.123 us | 0.336 us | 0.14 | 0.02 | - | - | - | - | | BufferedReadStreamWrapReadByte | .NET Core 2.1 | 16.68 us | 4.616 us | 0.253 us | 0.15 | 0.03 | - | - | - | - | | ArrayReadByte | .NET Core 2.1 | 15.13 us | 60.763 us | 3.331 us | 0.14 | 0.05 | - | - | - | - | | | | | | | | | | | | | | StandardStreamRead | .NET Core 3.1 | 92.44 us | 88.217 us | 4.835 us | 0.94 | 0.06 | - | - | - | - | | BufferedReadStreamRead | .NET Core 3.1 | 36.41 us | 5.923 us | 0.325 us | 0.37 | 0.00 | - | - | - | - | | BufferedReadStreamWrapRead | .NET Core 3.1 | 37.22 us | 9.628 us | 0.528 us | 0.38 | 0.01 | - | - | - | - | | StandardStreamReadByte | .NET Core 3.1 | 98.67 us | 20.947 us | 1.148 us | 1.00 | 0.00 | - | - | - | - | | BufferedReadStreamReadByte | .NET Core 3.1 | 41.36 us | 123.536 us | 6.771 us | 0.42 | 0.06 | - | - | - | - | | BufferedReadStreamWrapReadByte | .NET Core 3.1 | 39.11 us | 93.894 us | 5.147 us | 0.40 | 0.05 | - | - | - | - | | ArrayReadByte | .NET Core 3.1 | 18.84 us | 4.684 us | 0.257 us | 0.19 | 0.00 | - | - | - | - | */ }