On Mon, May 06, 2024 at 09:54:01AM +0100, Richard W.M. Jones wrote: > On Mon, May 06, 2024 at 10:16:45AM +0200, Florian Weimer wrote: > > * Richard W. M. Jones: > > > > > This email is mostly to notify that this is happening. I'm not sure > > > if a single package slowing down compilation means we need to do > > > anything here, but if anyone else sees similar symptoms, let us know. > > > > What blocks you from profiling it and fixing the performance issue? > > I did profile it down to a couple of functions in a very dark corner > of the compiler (see the thread on cocci devel list that I posted). > However in the time available last week I didn't have the time to > understand what it was doing or fix it.
(https://lore.kernel.org/cocci/20240502173148.gf30...@redhat.com/) I was thinking about filing an upstream bug, but this comment is interesting (not the bug itself, since the specific problem there is different): https://github.com/ocaml/ocaml/issues/10014#issuecomment-725270460 Some things we could take away from this: (1) It's expected. (2) They're not going to fix it as they're working on an even newer optimizer. (3) You can add -Oclassic to affected files to get the regular optimizer. [This isn't exactly what the option does, but using it does fix the issue.] My proposed fix / workaround: https://src.fedoraproject.org/rpms/coccinelle/pull-request/4 Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html -- _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
