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Tue, 09 Dec 2025 07:22:58 -0800 (PST) From: Rozhuk Ivan X-Google-Original-From: Rozhuk Ivan Date: Tue, 9 Dec 2025 17:22:55 +0200 To: Mark Millard Cc: Mateusz Guzik , Warner Losh , FreeBSD Current , FreeBSD-STABLE Mailing List , Konstantin Belousov 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: <20251209172255.6d1a7f4c@rimwks.local> In-Reply-To: <33F5F7DE-8DFA-47E2-A890-E07564825D05@yahoo.com> References: <18FB2858-5CBB-4B7A-8089-224A58C6A160@yahoo.com> <19A848A6-0042-4873-B70D-AD6805225B92@yahoo.com> <902C948B-0A4C-48E1-8C6C-1BC7A15209D7@yahoo.com> <33F5F7DE-8DFA-47E2-A890-E07564825D05@yahoo.com> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.51; amd64-portbld-freebsd14.3) List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; TAGGED_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Queue-Id: 4dQjKQ0h7vz3vrg On Mon, 8 Dec 2025 09:23:52 -0800 Mark Millard 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.