GenHTTP vs ASP.NET Minimal APIs: The C# Benchmark Showdown Nobody Expected

Two C# frameworks walk into a benchmark. One is the industry standard backed by Microsoft. The other is a scrappy indie framework most .NET developers have never heard of. You'd expect a blowout — and you'd be right. You just might be wrong about who gets blown out where. HttpArena recently added both GenHTTP and ASP.NET Minimal APIs to their benchmark suite, and the results tell a story that's way more interesting than "Microsoft wins." Let's dig in. The Contenders ASP.NET Minimal APIs needs no introduction. It's Microsoft's lightweight API framework running on Kestrel, the battle-tested HTTP server that powers half the internet's .NET workloads. Minimal APIs strip away controllers and give you app.MapGet("/route", handler) — clean, fast, no ceremony. GenHTTP is a modular, embeddable C# web server that runs its own HTTP engine. It layers on abstractions — layouts, services, concerns, resource methods — giving you a higher-level programming model. Think "convention over configuration"