Ported HttpParserBench to BenchmarkDotNet (#2243)

tests/Benchmarks/Http/HttpParser.cs

@@ -0,0 +1,111 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using BenchmarkDotNet.Attributes;
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Http.Parser;
+
+public class HttpParser
+{
+    private const string _plaintextTechEmpowerRequest =
+        "GET /plaintext HTTP/1.1\r\n" +
+        "Host: localhost\r\n" +
+        "Accept: text/plain,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7\r\n" +
+        "Connection: keep-alive\r\n" +
+        "\r\n";
+
+    private const string _plaintextTechEmpowerHeaders =
+    "Host: localhost\r\n" +
+    "Accept: text/plain,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7\r\n" +
+    "Connection: keep-alive\r\n" +
+    "\r\n";
+
+    private static readonly byte[] s_plaintextTechEmpowerHeadersArray = Encoding.UTF8.GetBytes(_plaintextTechEmpowerHeaders);
+    private static readonly byte[] s_plaintextTechEmpowerRequestArray = Encoding.UTF8.GetBytes(_plaintextTechEmpowerRequest);
+
+    private static readonly ReadOnlySequence<byte> s_plaintextTechEmpowerRequestRos = new ReadOnlySequence<byte>(s_plaintextTechEmpowerRequestArray);
+    private static readonly ReadOnlySequence<byte> s_plaintextTechEmpowerHeadersRos = new ReadOnlySequence<byte>(s_plaintextTechEmpowerHeadersArray);
+
+    private static readonly System.Text.Http.Parser.HttpParser s_parser = new System.Text.Http.Parser.HttpParser();
+
+    [Benchmark]
+    public void RequestLine()
+    {
+        var request = new Request();
+        s_parser.ParseRequestLine(request, s_plaintextTechEmpowerRequestRos, out _, out _);
+    }
+
+    [Benchmark]
+    public void Headers()
+    {
+        var request = new Request();
+        s_parser.ParseHeaders(request, s_plaintextTechEmpowerHeadersRos, out _, out _, out _);
+    }
+
+    [Benchmark]
+    public void FullRequest()
+    {
+        var request = new Request();
+        s_parser.ParseRequestLine(request, s_plaintextTechEmpowerRequestRos, out var consumed, out _);
+        s_parser.ParseHeaders(request, s_plaintextTechEmpowerRequestRos.Slice(consumed), out consumed, out _, out _);
+    }
+}
+
+class Request : IHttpHeadersHandler, IHttpRequestLineHandler
+{
+    //public Http.Method Method;
+    //public Http.Version Version;
+    //public string Path;
+    //public string Query;
+    //public string Target;
+
+    public Dictionary<string, string> Headers = new Dictionary<string, string>();
+
+    public void OnHeader(ReadOnlySpan<byte> name, ReadOnlySpan<byte> value)
+    {
+        //var nameString = PrimitiveEncoder.DecodeAscii(name);
+        //var valueString = PrimitiveEncoder.DecodeAscii(value);
+        //Headers.Add(nameString, valueString);
+    }
+
+    public void OnStartLine(Http.Method method, Http.Version version, ReadOnlySpan<byte> target, ReadOnlySpan<byte> path, ReadOnlySpan<byte> query, ReadOnlySpan<byte> customMethod, bool pathEncoded)
+    {
+        //Method = method;
+        //Version = version;
+        //Path = PrimitiveEncoder.DecodeAscii(path);
+        //Query = PrimitiveEncoder.DecodeAscii(query);
+        //Target = PrimitiveEncoder.DecodeAscii(target);
+    }
+}
+
+struct RequestStruct : IHttpHeadersHandler, IHttpRequestLineHandler
+{
+    //public Http.Method Method;
+    //public Http.Version Version;
+    //public string Path;
+    //public string Query;
+    //public string Target;
+
+    //public Dictionary<string, string> Headers = new Dictionary<string, string>();
+
+    public void OnHeader(ReadOnlySpan<byte> name, ReadOnlySpan<byte> value)
+    {
+        //var nameString = PrimitiveEncoder.DecodeAscii(name);
+        //var valueString = PrimitiveEncoder.DecodeAscii(value);
+        //Headers.Add(nameString, valueString);
+    }
+
+    public void OnStartLine(Http.Method method, Http.Version version, ReadOnlySpan<byte> target, ReadOnlySpan<byte> path, ReadOnlySpan<byte> query, ReadOnlySpan<byte> customMethod, bool pathEncoded)
+    {
+        //Method = method;
+        //Version = version;
+        //Path = PrimitiveEncoder.DecodeAscii(path);
+        //Query = PrimitiveEncoder.DecodeAscii(query);
+        //Target = PrimitiveEncoder.DecodeAscii(target);
+    }
+}
+