Date: 2025-08-12

Speakers:
  • Stefan Pölz

Recording

Link to Recording: https://www.youtube.com/live/ZC5hfjyiFGY?si=duI6UKloA47g7qOh&t=3696

Would you like to know how incremental source generation and source-level interception grant you Native AOT & performance “for free”?

The just-in-time compiler (JIT) is a mighty beast of the .NET runtime. And it becomes more powerful with every consecutive release of .NET. But it comes along with a cost during run-time, when compiling the assemblies containing intermediate language code into machine code. A price we may not pay gladly for highly scalable cloud services. Native AOT, compiling deployments ahead-of-time into executable code, moves this complexity to compile-time. But features that utilize dynamic code emission may stop working.

As a solution serve Interceptors which were shipped as experimental C#-only feature in .NET 8 and became GA in .NET 9. An interceptor is basically the inverse of a goto statement that enables the Roslyn compiler to replace reflection-based call sites with specialized implementations. Emitted from (incremental) source generators, codebases become more trimmable, more Native AOT-friendly and can unlock better performance.

May Roslyn be with you!

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