In Fedora we enable flambda in our OCaml package. Debian does not. Flambda is "a series of optimisation passes provided by the native code compilers as of OCaml 4.03" and "aims to make it easier to write idiomatic OCaml code without incurring performance penalties". In other words, it claims to be a better optimizer. More here: https://ocaml.org/manual/5.1/flambda.html We recently found that one package (coccinelle) takes much, much longer to compile when this is enabled. As in one particular file goes from seconds -> 30 minutes to compile. I investigated and the difference is entirely explained by enabling flambda, and goes away when disabled. Apart from this being annoying, it doesn't seem to be a problem in any other way (for example, the final program doesn't noticable run faster or slower). Upstream coccinelle seem to be using Debian and therefore haven't seen the problem. Thread about all that: https://lore.kernel.org/cocci/20240502085433.GA30267@xxxxxxxxxx/ 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. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v -- _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
