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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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'Rust makes coding fun again': Why Linux is moving away from C, according to Greg Kroah-Hartman (www.zdnet.com)

submitted 2 days ago by HaraldvonBlauzahn@feddit.org to c/linux@lemmy.ml

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[–] asdfasdfasdf@lemmy.world 2 points 2 days ago (1 children)

Yeah I doubt it. I've worked in large Rust codebases too. I'd do some benchmarking. Cargo has some nice flags that let you see exactly what it's doing. You can open the compilation report up in a browser and zoom in on different steps of the process and see everything.

[–] yogthos@lemmy.ml 2 points 2 days ago (1 children)

I've tried looking before and couldn't get a significant improvement. I'll have to investigate it again I guess.

[–] ISO@lemmy.zip 3 points 2 days ago (2 children)

Make sure you're using a fast linker. Although I think lld is the default now, so that should be less of a concern these days. But see if mold or wild would help.

More relevantly, you should be using cranelift for codegen in dev builds.

If you have codegen-units = 1 in your release profile, make sure you have a separate dev profile that doesn't.

If you still experience decapitating slowness (doubtful), and it's actually the rust compiler being slow (super doubtful), you can try the parallel frontend. Apparently there are almost™ no bugs left in its implementation (It's one of the project priorities now).

Needless to say, but you should be checking your --timings to really know what's going on.

[–] MangoCats@feddit.it 1 points 2 days ago

The various linkers do make a difference, but all of them choke, eventually, when individual files get too massive.

[–] yogthos@lemmy.ml 1 points 2 days ago (1 children)

thanks will see what happens

[–] ISO@lemmy.zip 1 points 1 day ago (1 children)

It would be a cool if you report back in a separate post if you discovered anything interesting. It's not like we're overwhelmed by too much activity here.

Also, while I think it should be obvious, but I forgot to clarify that if you're inheriting from a profile with codegen-units = 1, then you need to set that explicitly to a higher value in the inheriting profile.

[–] yogthos@lemmy.ml 1 points 1 day ago

yeah, if I find any dramatic improvement I'll follow up