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Fix docs about "LLVM Marshal Methods" #2566

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Oct 15, 2024
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Fix docs about "LLVM Marshal Methods" #2566

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13 changes: 7 additions & 6 deletions docs/whats-new/dotnet-9.md
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Expand Up @@ -545,19 +545,20 @@ For more information about Android asset packs, see [Android asset packs](~/andr
<TargetFramework>net9.0-android35</TargetFramework>
```

### LLVM marshalled methods
### LLVM Marshal Methods

Low-level Virtual Machine (LLVM) marshalled methods are now enabled by default in .NET for Android 9 in non-Blazor apps. This has resulted in a [~10% improvement in performance in a test app](https://github.com/xamarin/xamarin-android/pull/8925).
Improvements to Low-level Virtual Machine (LLVM) Marshal Methods in .NET 9, has made the feature work more reliably in applications but is not yet the default. Enabling this feature has resulted in a [~10% improvement in performance in a test app](https://github.com/dotnet/android/commit/a9706b6ef0429250ecaf1e500d77cd19e94e2eb5).

LLVM marshalled methods can be disabled in your project file (*.csproj*):
LLVM Marshal Methods can be enabled in your project file (*.csproj*) via the `$(AndroidEnableMarshalMethods)` property:

```xml
<PropertyGroup Condition="'$(TargetFramework)' == 'net9.0-android'">
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There is no need to put Condition in the example as $(AndroidEnableMarshalMethods) will have no affect on other platforms.

<AndroidEnableLLVM>false</AndroidEnableLLVM>
<AndroidEnableLLVMOptimizations>false</AndroidEnableLLVMOptimizations>
<PropertyGroup>
<AndroidEnableMarshalMethods>true</AndroidEnableMarshalMethods>
</PropertyGroup>
```

For specific details about the feature, see the [implementation on GitHub](https://github.com/dotnet/android/commit/8bc7a3e84f95e70fe12790ac31ecd97957771cb2).

### Trimming enhancements

.NET for Android 9 includes fixes for when using full trimming to reduce app size. Full trimming is usually only enabled for release builds of your app, and can be configured in your project file (*.csproj*):
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