[aengelke]

In terms of runtime performance, the TPDE-generated code is comparable with and sometimes a bit faster than LLVM -O0.

I agree that front-ends are a big performance problem and both rustc and Clang (especially in C++ mode) are quite slow. For Clang with LLVM -O0, 50-80% is front-end time, with TPDE it's >98%. More work on front-end performance is definitely needed; maybe some things can be learned from Carbon. With mold or lld, I don't think linking is that much of a problem.

We now support most LLVM-IR constructs that are frequently generated by rustc (most notably, vectors). I just didn't get around to actually integrate it into rustc and get performance data.

> The 10-20x improvement described here doesn’t work yet for clang

Not sure what you mean here, TPDE can compile C/C++ programs with Clang-generated LLVM-IR (95% of llvm-test-suite SingleSource/MultiSource, large parts of the LLVM monorepo).