PublishTrimmed build time regression.

[sebastienros]

Not happening with all applications. Reproduced on Windows and Linux.

Between SDKs (installer) 9.0.100-preview.2.24112.28 and 9.0.100-preview.2.24113.7

Before:

crank --config https://raw.githubusercontent.com/aspnet/Benchmarks/main/scenarios/plaintext.benchmarks.yml --config https://raw.githubusercontent.com/aspnet/Benchmarks/main/build/ci.profile.yml --scenario plaintext --profile intel-win-app --profile intel-load2-load --application.buildArguments "/p:PublishReadyToRun=true /p:PublishSingleFile=true /p:PublishTrimmed=true" --application.framework net9.0 --application.aspNetCoreVersion 9.0.0-preview.2.24112.24 --application.runtimeVersion 9.0.0-preview.2.24112.16 --application.sdkVersion 9.0.100-preview.2.24112.28 --profile noload

After

crank --config https://raw.githubusercontent.com/aspnet/Benchmarks/main/scenarios/plaintext.benchmarks.yml --config https://raw.githubusercontent.com/aspnet/Benchmarks/main/build/ci.profile.yml --scenario plaintext --profile intel-win-app --profile intel-load2-load --application.buildArguments "/p:PublishReadyToRun=true /p:PublishSingleFile=true /p:PublishTrimmed=true" --application.framework net9.0 --application.aspNetCoreVersion 9.0.0-preview.2.24112.24 --application.runtimeVersion 9.0.0-preview.2.24112.16 --application.sdkVersion 9.0.100-preview.2.24113.7 --profile noload

[baronfel]

@sebastienros is it possible to collect and provide binlogs for these test runs? That would be the minimum to do any analysis here.

[sebastienros]

msbuild.zip

I used a different machine with less cores and it was actually quicker. Still noticeable difference.

[sebastienros]

Before

After

[vitek-karas]

@sbomer @jtschuster - probably some of the recent changes.

[sbomer]

Linker diff between those package versions:
6ac1edf0b2b Mark most specific static DIM for types marked RelevantToVariantCasting (#97487)
8af0b009868 Don't use IEnumerable and yield return for GetDefaultInterfaceImplementations (#98183)