4.x: ComparisonBenchmarks solution

Rx.NET/ComparisonBenchmarks/ComparisonBenchmarks.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27703.2035
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ComparisonBenchmarks", "ComparisonBenchmarks\ComparisonBenchmarks.csproj", "{50DDB92A-793F-43DF-A84E-1759A235A15D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{50DDB92A-793F-43DF-A84E-1759A235A15D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{50DDB92A-793F-43DF-A84E-1759A235A15D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{50DDB92A-793F-43DF-A84E-1759A235A15D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{50DDB92A-793F-43DF-A84E-1759A235A15D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {643F4DF5-5DD7-4AFB-A95E-29414DDA9379}
+	EndGlobalSection
+EndGlobal

Rx.NET/ComparisonBenchmarks/ComparisonBenchmarks/ComparisonBenchmarks.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.10.14" />
+    <PackageReference Include="System.Reactive" Version="4.1.0-preview.215" />
+  </ItemGroup>
+
+</Project>

Rx.NET/ComparisonBenchmarks/ComparisonBenchmarks/Program.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using BenchmarkDotNet.Running;
+
+namespace ComparisonBenchmarks
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            var switcher = new BenchmarkSwitcher(new[] {
+                typeof(RangeBenchmark)
+            });
+
+            switcher.Run();
+            Console.ReadLine();
+        }
+    }
+}

Rx.NET/ComparisonBenchmarks/ComparisonBenchmarks/RangeBenchmark.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Reactive.Linq;
+using System.Threading;
+using BenchmarkDotNet.Attributes;
+
+namespace ComparisonBenchmarks
+{
+    [MemoryDiagnoser]
+    public class RangeBenchmark
+    {
+        [Params(1, 10, 100, 1000, 10000, 100000, 1000000)]
+        public int N;
+        private int _store;
+
+        [Benchmark]
+        public void Range()
+        {
+            Observable.Range(1, N).Subscribe(v => Volatile.Write(ref _store, v));
+        }
+    }
+}