Date: Tue, 9 Dec 2025 12:32:46 -0800 From: Mark Millard <marklmi@yahoo.com> To: Rozhuk Ivan <rozhuk.im@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: performance regressions in 15.0 [The Microsoft Dev Kit 2023 buildworld took about 6 minutes less time for jemalloc 5.3.0, not more, for non-debug contexts] Message-ID: <A59383DF-4AB6-41C9-8506-BC543748EE10@yahoo.com> In-Reply-To: <20251209172255.6d1a7f4c@rimwks.local> References: <EF95C136-B1D2-4820-A069-D0078A3B5A05@yahoo.com> <18FB2858-5CBB-4B7A-8089-224A58C6A160@yahoo.com> <CANCZdfqfXfzGQRN5TR7KFcNE1-Ng4ECFKD_6V0118b2UwwX09Q@mail.gmail.com> <19A848A6-0042-4873-B70D-AD6805225B92@yahoo.com> <902C948B-0A4C-48E1-8C6C-1BC7A15209D7@yahoo.com> <CAGudoHGQUc6QT9ApyQxh4WE2Q9ZBh4-SxAhCcCYE9k_UobovhQ@mail.gmail.com> <33F5F7DE-8DFA-47E2-A890-E07564825D05@yahoo.com> <20251209172255.6d1a7f4c@rimwks.local>
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On Dec 9, 2025, at 07:22, Rozhuk Ivan <rozhuk.im@gmail.com> wrote: > On Mon, 8 Dec 2025 09:23:52 -0800 > Mark Millard <marklmi@yahoo.com> wrote: > >> But, as of yet, I've no good evidence for blaming >> jemalloc as a major contributor to those timing >> ratios --or for blaming any other specific part >> of 15.0 . > > If you want to bench jmalloc - there is another ways to do that without building something. > Try to find some sythetic benchmarks. > Also jmalloc can be build without OS rebuild and linked with bench. > > This 2 things can reduce time to tests, but it will eliminate OS integation factors. > Run same bench on different OS may give more info. > [I've eliminated direct Email to most everyone for this reply. There is not even minor new technical content.] At this point I'm more likely to explore if I get similar ratios as ampere[13] do for some port-package builds that have the large ratios on ampere[13]. There are examples that are not as overall time consuming for ampere[13] as what I've already referenced (but are still non-trivial for the time taken). As stands, I do not have a good reproduce-the-issue context, much less one with build time frames I'd be willing to deal with in my environment. === Mark Millard marklmi at yahoo.comhelp
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