Native AOT compilation is now production-ready for most ASP.NET Core API projects on .NET 10. Applications publish to a single native executable with no JIT overhead and significantly reduced memory footprint at startup.

The main benefit appears in containerized and serverless environments where cold-start latency and image size directly affect cost and responsiveness. Teams that have migrated report 40-60% smaller container images and sub-100 ms startup times on modest hardware.

#Enabling Native AOT

Add the PublishAot property and trim warnings as errors during development to surface issues early.

xml 
<PropertyGroup>
  <PublishAot>true</PublishAot>
  <TrimmerSingleWarn>false</TrimmerSingleWarn>
</PropertyGroup>

Run dotnet publish with the target runtime to produce the native binary.

bash 
dotnet publish -c Release -r linux-x64

#Common Limitations

  • Reflection-heavy libraries require explicit DynamicDependency attributes or source-generated alternatives.
  • Entity Framework Core still needs additional configuration for model trimming.
  • Some diagnostic and logging providers have reduced functionality under AOT.

#Practical Migration Steps

Start with a minimal API project. Replace any runtime type inspection with source generators. Test thoroughly with the trimmed publish output before moving to larger services.

Monitor binary size and startup metrics after each iteration. Revert to JIT publishing only for services that rely on heavy dynamic loading.

#Takeaway

Evaluate Native AOT on new or green-field API projects first. The gains in startup time and deployment size are immediate once reflection usage is addressed.