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lix/doc/manual/rl-next/build-timing-analysis.md
Jade Lovelace 24057dcb6a Remove rl-next-dev 
We realized that there's really no good place to put these dev facing
bulletins, and the user-facing release notes aren't really the worst
place to put them, I guess, and we do kind of hope that it converts
users to devs.

Change-Id: Id9387b2964fe291cb5a3f74ad6344157f19b540c
2024-06-06 15:08:12 -07:00

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synopsis cls category
Clang build timing analysis 587 Development

We now have Clang build profiling available, which generates Chrome tracing files for each compilation unit. To enable it, run meson configure build -Dprofile-build=enabled in a Clang stdenv (nix develop .#native-clangStdenvPackages) then rerun the compilation.

If you want to make the build go faster, do a clang build with meson, then run maintainers/buildtime_report.sh build, then contemplate how to improve the build time.

You can also look at individual object files' traces in https://ui.perfetto.dev.

See the wiki page for more details on how to do this.