Hi, Mark H Weaver <m...@netris.org> writes:
> Mathieu Othacehe <othac...@gnu.org> writes: > >>> Any idea what could be wrong, Mathieu? What would you suggest to do >>> when investigating such issues? >> >> Yes I noticed it. The main problem here is that almost all workers are >> stuck building Rust. >> >> I see two actions here: >> >> 1. Understand why Rust is taking so long to build. > > The attached patch, which I've been using on my private branch of Guix > for a long time and is fully tested, would significantly speed up the > Rust bootstrap. I never submitted it because I wasn't sure it would be > of interest. > > Mark FWIW, the tests are already disabled on core-updates, which reduced the build time by 33%. Also we now bootstrap from 1.29 there instead of 1.19. The net result is a 50% faster bootstrap (8 hours) compared to master (16 hours) on a 3900X Ryzen processor. That's still a lot of time. I hope that the effort to produce a GCC front end for Rust succeeds [0]. Otherwise mrustc, which we already use to bootstrap rust, is now able to bootstrap from 1.39 (unreleased yet though), so we should look into making use of it [1]. Maxim [0] https://github.com/Rust-GCC/gccrs [1] https://github.com/thepowersgang/mrustc/
