On Sun, Aug 6, 2023 at 5:35 AM Daniel Alley <dal...@redhat.com> wrote: > > >In my test zlib-ng is about 40% faster. > > I did some testing with zlib-ng and createrepo-c a few months ago [0], and I > also found that the compression portion of the workload was about 40% faster. > So this matches my experience, too. > > (BTW, if that github comment [0] sounds negative, it isn't meant to, it's > just that zlib ended up not being the primary culprit of the performance > issue I was investigating at the time, so I was not as immediately interested > in replacing it.) > > I support this proposal. A tricky detail is that one of the big upsides of > zlib-ng is that it has a lot of optimized codepaths for ARM, POWER, Z, > RISC-V, AVX-256, AVX-512 and so forth which madler/zlib does not have. And > that's fantastic, but I expect it could make the testing process a bit more > painful.
We tried to pull some of the optimisations in some time ago to the Fedora package and they caused some issues with compatibility. > Since each of the arch-specific acceleration codepaths is behind a separate > build flag [1] though, (I assume) we could easily do a more conservative > rollout with most arch-specific optimizations disabled at first, and then > enabled gradually over time. > > [0] > https://github.com/rpm-software-management/createrepo_c/pull/335#issuecomment-1381362220 > [1] https://github.com/zlib-ng/zlib-ng#advanced-build-options > _______________________________________________ > 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 _______________________________________________ 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
