[AspNetCore] Simplify benchmarks and add gRPC

Directory.Packages.props

@@ -119,6 +119,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="8.0.25" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.25" />
     <PackageVersion Include="Microsoft.AspNetCore.SignalR.Client" Version="8.0.25" />
+    <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="8.0.25" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="7.0.0" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.25" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.25" />
@@ -151,11 +152,13 @@
     <PackageVersion Update="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="9.0.14" />
     <PackageVersion Update="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.14" />
     <PackageVersion Update="Microsoft.AspNetCore.SignalR.Client" Version="9.0.14" />
+    <PackageVersion Update="Microsoft.AspNetCore.TestHost" Version="9.0.14" />
   </ItemGroup>
   <ItemGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net10.0'))" Label="Non-production packages, such as for examples and tests, for .NET 10">
     <PackageVersion Update="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="10.0.5" />
     <PackageVersion Update="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.5" />
     <PackageVersion Update="Microsoft.AspNetCore.SignalR.Client" Version="10.0.5" />
+    <PackageVersion Update="Microsoft.AspNetCore.TestHost" Version="10.0.5" />
   </ItemGroup>
 
 </Project>

test/OpenTelemetry.Instrumentation.AspNetCore.Benchmarks/AspNetCoreBenchmarks.cs

@@ -0,0 +1,143 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+using BenchmarkDotNet.Attributes;
+using Greet;
+using Grpc.Core;
+using Grpc.Net.Client;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using OpenTelemetry.Metrics;
+using OpenTelemetry.Trace;
+
+namespace OpenTelemetry.Instrumentation.AspNetCore.Benchmarks;
+
+[MemoryDiagnoser]
+public class AspNetCoreBenchmarks
+{
+    private static readonly Uri BaseAddress = new("/", UriKind.Relative);
+
+    private readonly HelloRequest helloRequest = new();
+    private HttpClient? httpClient;
+    private Greeter.GreeterClient? grpcClient;
+    private WebApplication? app;
+    private TracerProvider? tracerProvider;
+    private MeterProvider? meterProvider;
+
+    [Flags]
+    public enum EnableInstrumentationOption
+    {
+        /// <summary>
+        /// Instrumentation is not enabled for any signal.
+        /// </summary>
+        None = 0,
+
+        /// <summary>
+        /// Instrumentation is enabled only for Traces.
+        /// </summary>
+        Traces = 1,
+
+        /// <summary>
+        /// Instrumentation is enabled only for Metrics.
+        /// </summary>
+        Metrics = 2,
+    }
+
+    [Params(EnableInstrumentationOption.None, EnableInstrumentationOption.Traces, EnableInstrumentationOption.Metrics, EnableInstrumentationOption.Traces | EnableInstrumentationOption.Metrics)]
+    public EnableInstrumentationOption EnableInstrumentation { get; set; }
+
+    [GlobalSetup]
+    public async Task StartServer()
+    {
+        await this.StartWebApplicationAsync();
+
+        KeyValuePair<string, string?>[] config =
+        [
+            new("OTEL_DOTNET_EXPERIMENTAL_ASPNETCORE_ENABLE_GRPC_INSTRUMENTATION", "true"),
+        ];
+
+        IConfiguration configuration = new ConfigurationBuilder()
+            .AddInMemoryCollection(config)
+            .Build();
+
+        if (this.EnableInstrumentation.HasFlag(EnableInstrumentationOption.Traces))
+        {
+            this.tracerProvider = Sdk.CreateTracerProviderBuilder()
+                .ConfigureServices((services) => services.AddSingleton(configuration))
+                .AddAspNetCoreInstrumentation()
+                .Build();
+        }
+
+        if (this.EnableInstrumentation.HasFlag(EnableInstrumentationOption.Metrics))
+        {
+            this.meterProvider = Sdk.CreateMeterProviderBuilder()
+                .ConfigureServices((services) => services.AddSingleton(configuration))
+                .AddAspNetCoreInstrumentation()
+                .Build();
+        }
+    }
+
+    [GlobalCleanup]
+    public async Task StopServer()
+    {
+        this.httpClient?.Dispose();
+
+        if (this.app != null)
+        {
+            await this.app.StopAsync();
+            await this.app.DisposeAsync();
+        }
+
+        this.tracerProvider?.Dispose();
+        this.meterProvider?.Dispose();
+    }
+
+    [Benchmark]
+    public async Task HttpGet()
+    {
+        using var httpResponse = await this.httpClient!.GetAsync(BaseAddress).ConfigureAwait(false);
+        httpResponse.EnsureSuccessStatusCode();
+    }
+
+    [Benchmark]
+    public async Task<HelloReply> GrpcGet() =>
+        await this.grpcClient!.SayHelloAsync(this.helloRequest);
+
+    private async Task StartWebApplicationAsync()
+    {
+        var builder = WebApplication.CreateBuilder();
+
+        builder.Logging.ClearProviders();
+        builder.WebHost.UseTestServer();
+
+        builder.Services.AddGrpc();
+
+        var app = builder.Build();
+
+        app.MapGet("/", async context => await context.Response.WriteAsync("Hello World!"));
+
+        app.MapGrpcService<GreeterService>();
+
+        await app.StartAsync();
+
+        this.app = app;
+        this.httpClient = app.GetTestClient();
+
+        var channel = GrpcChannel.ForAddress("http://localhost", new()
+        {
+            HttpClient = this.httpClient,
+        });
+
+        this.grpcClient = new Greeter.GreeterClient(channel);
+    }
+
+    private sealed class GreeterService : Greeter.GreeterBase
+    {
+        public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context) =>
+            Task.FromResult(new HelloReply { Message = "Hello " + request.Name });
+    }
+}