feat: add benchmark test project for Go vs .NET server comparison

Side-by-side performance benchmarks using NATS.Client.Core against both servers on ephemeral ports. Includes core pub/sub, request/reply latency, and JetStream throughput tests with comparison output and benchmarks_comparison.md results. Also fixes timestamp flakiness in StoreInterfaceTests by using explicit timestamps.
2026-03-13 01:23:31 -04:00
parent e9c86c51c3
commit 37575dc41c
28 changed files with 2264 additions and 12 deletions
--- a/tests/NATS.Server.Benchmark.Tests/JetStream/SyncPublishTests.cs
+++ b/tests/NATS.Server.Benchmark.Tests/JetStream/SyncPublishTests.cs
@@ -0,0 +1,62 @@
+using NATS.Client.Core;
+using NATS.Client.JetStream;
+using NATS.Client.JetStream.Models;
+using NATS.Server.Benchmark.Tests.Harness;
+using NATS.Server.Benchmark.Tests.Infrastructure;
+using Xunit.Abstractions;
+
+namespace NATS.Server.Benchmark.Tests.JetStream;
+
+[Collection("Benchmark-JetStream")]
+public class SyncPublishTests(JetStreamServerPairFixture fixture, ITestOutputHelper output)
+{
+    private readonly BenchmarkRunner _runner = new() { WarmupCount = 500, MeasurementCount = 10_000 };
+
+    [Fact]
+    [Trait("Category", "Benchmark")]
+    public async Task JSSyncPublish_16B_MemoryStore()
+    {
+        const int payloadSize = 16;
+
+        var dotnetResult = await RunSyncPublish("JS Sync Publish (16B Memory)", "DotNet", payloadSize, fixture.CreateDotNetClient);
+
+        if (fixture.GoAvailable)
+        {
+            var goResult = await RunSyncPublish("JS Sync Publish (16B Memory)", "Go", payloadSize, fixture.CreateGoClient);
+            BenchmarkResultWriter.WriteComparison(output, goResult, dotnetResult);
+        }
+        else
+        {
+            BenchmarkResultWriter.WriteSingle(output, dotnetResult);
+        }
+    }
+
+    private async Task<BenchmarkResult> RunSyncPublish(string name, string serverType, int payloadSize, Func<NatsConnection> createClient)
+    {
+        var payload = new byte[payloadSize];
+        var streamName = $"BENCH_SYNC_{serverType.ToUpperInvariant()}_{Guid.NewGuid():N}"[..30];
+        var subject = $"bench.js.sync.{serverType.ToLowerInvariant()}";
+
+        await using var nats = createClient();
+        await nats.ConnectAsync();
+        var js = new NatsJSContext(nats);
+
+        await js.CreateStreamAsync(new StreamConfig(streamName, [subject])
+        {
+            Storage = StreamConfigStorage.Memory,
+            Retention = StreamConfigRetention.Limits,
+            MaxMsgs = 1_000_000,
+        });
+
+        try
+        {
+            var result = await _runner.MeasureThroughputAsync(name, serverType, payloadSize,
+                async _ => await js.PublishAsync(subject, payload));
+            return result;
+        }
+        finally
+        {
+            await js.DeleteStreamAsync(streamName);
+        }
+    }
+}