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net6 trimmable support#597
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jpobst
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Apr 5, 2022
jonathanpeppers
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To keep app sizes down in the .NET 6 timeframe, we special-cased existing AndroidX and GPS packages so they were always trimmed. Modern packages mark themselves trimmable with `$(IsTrimmable)` or the assembly-level attribute. For nearly 2 years, we've applied the appropriate trimming setting in these packages: * dotnet/android-libraries#520 * xamarin/GooglePlayServicesComponents#597 We should be able to remove this now in .NET 9.
jonathanpeppers
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Jan 11, 2024
To keep app sizes down in the .NET 6 timeframe, we special-cased existing AndroidX and GPS packages so they were always trimmed. Modern packages mark themselves trimmable with `$(IsTrimmable)` or the assembly-level attribute. For nearly 2 years, we've applied the appropriate trimming setting in these packages: * dotnet/android-libraries#520 * xamarin/GooglePlayServicesComponents#597 We should be able to remove this now in .NET 9. With this change in place, an existing app size regression test failed that was using an old version of Xamarin.Forms (and AndroidX): Saving apk description to 'BuildReleaseArm64XFormsDotNet.apkdesc' Size difference in bytes ([*1] apk1 only, [*2] apk2 only): 253,683 assemblies/Xamarin.AndroidX.Core.dll 179,063 assemblies/Xamarin.Google.Android.Material.dll 157,233 assemblies/Xamarin.AndroidX.AppCompat.dll 104,239 assemblies/Xamarin.AndroidX.Media.dll *2 52,862 assemblies/Xamarin.AndroidX.Annotation.dll *2 48,743 assemblies/Xamarin.AndroidX.RecyclerView.dll 39,419 assemblies/Xamarin.AndroidX.Transition.dll *2 38,993 assemblies/Xamarin.AndroidX.Browser.dll *2 To avoid this increase: update the app size test from Xamarin.Forms 4.7.0.1142 to 5.0.0.2515. This allowed us to no longer need the `%(TrimMode)=link` changes, however updating Xamarin.Forms increased app size in other ways. * New AndroidX libraries contain considerable more `AndroidResource` and Java code. * New AndroidX `.dll` files appeared for new packages. * Luckily, it appears that no AndroidX `.dll` files grew in size, which is what would be the result of the `%(TrimMode)=link` change if it were still needed. Overall app size change in this test: --"PackageSize": 7941134 ++"PackageSize": 9593384
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Does this change any of the generated binding API's?
No
Describe your contribution
Added trimmable support to build parameters