If you’re willing to compile, ship and support custom builds of .NET runtime, gonna be less than 20-30 MB.
coreclr.dll (the runtime) is 4.9 MB, clrjit.dll (JIT compiler) is 1.3 MB. The rest is mostly standard libraries, the largest piece of that is System.Private.CoreLib.dll at 9 MB. The numbers are for Win64 version of .NET 5.0.2.
Another thing, for .NET apps the runtime is required anyway, the overhead for runtime code generation is zero.
For C++ apps, llvm + clang (or an equivalent) is only needed on developer’s computers, not something you’d normally ship.
Indeed.
.NET runtime takes about 30 MB, or 50 MB if you're on Windows and need desktop components. Links there: https://dotnet.microsoft.com/download/dotnet/5.0
clang+llvm package takes 300-400 MB, that's almost an order of magnitude difference: https://github.com/llvm/llvm-project/releases/tag/llvmorg-11...