[.NET] Build time is slower #10251
Description
Build time is significantly slower with .NET 6 than with Xamarin.iOS.
- Checkout and build the dotnet-size-comparison-helloworld branch from my fork.
- Execute:
cd tests/dotnet
git clean -xfdq
make compareThen check the bin logs in the tests/dotnet directory.
Xamarin.iOS takes 11s to build:
$ msbuild /v:diag build-oldnet.binlog | tail -n 15
62 ms ResolveAssemblyReference 1 calls
69 ms DetectSigningIdentity 1 calls
103 ms DetectSdkLocations 1 calls
119 ms SymbolStrip 1 calls
126 ms SpotlightIndexer 1 calls
186 ms Codesign 2 calls
653 ms DSymUtil 1 calls
772 ms Csc 1 calls
8388 ms MTouch 1 calls
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:11.24
.NET 6 takes 18s to build:
$ msbuild /v:diag build-dotnet.binlog | tail -n 15
200 ms MSBuild 7 calls
296 ms LinkNativeCode 1 calls
393 ms GenerateDepsFile 2 calls
501 ms Codesign 2 calls
917 ms Csc 1 calls
1185 ms AOTCompile 1 calls
1222 ms CopyRefAssembly 1 calls
3276 ms CompileNativeCode 2 calls
8576 ms ILLink 1 calls
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:18.55
The ILLink task significantly longer than the MTouch task used to take (which also includes AOT compilation and native code compilation).