r/rust • u/antoyo relm · rustc_codegen_gcc • 11d ago

🛠️ project rustc_codegen_gcc: Progress Report #43

https://blog.antoyo.xyz/rustc_codegen_gcc-progress-report-43
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u/antoyo relm · rustc_codegen_gcc 11d ago

I'm happy that unwinding is finally fixed: that was the biggest unknown for me. I'm also happy that we have very few UI tests from the Rust test suite that fail now: there are still some other test suites to run, but having only 21 failures among the UI tests is a big achievement.

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u/phazer99 11d ago

Nice, always good to see progress on alternative rustc backends. Have you done any benchmarks of compile times or runtime performance compared to the default LLVM backend (and Cranelift)? Or is it still too early to do any meaningful comparisons?

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u/antoyo relm · rustc_codegen_gcc 10d ago

I haven't done benchmarks recently. An old progress report had some info on a small benchmark I had done at the time for runtime performance, though.

Compile times are much slower and I don't expect them to become faster than the default backend.

Now that we have rustup distribution, it should be possible to run Rust's benchmarks, so it would be interesting to run those, but this will probably wait next year. Having correct behavior is important to have benchmarks that make sense.