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Mon, 08 Dec 2025 04:33:08 -0800 (PST) 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 References: <20251206222638.44edcd5c@rimwks.local> <20251207203109.6d58b901@rimwks.local> In-Reply-To: <20251207203109.6d58b901@rimwks.local> From: Mateusz Guzik Date: Mon, 8 Dec 2025 13:32:56 +0100 X-Gm-Features: AQt7F2oA-EqYNThxHWWEUyvuPKX-Ide8Q1hMVBACvwLeBubmek5r42bxJIExFTM Message-ID: Subject: Re: performance regressions in 15.0 To: Rozhuk Ivan Cc: Konstantin Belousov , FreeBSD Current , emaste@freebsd.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.95 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.95)[-0.952]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20230601]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; FREEMAIL_TO(0.00)[gmail.com]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; DKIM_TRACE(0.00)[gmail.com:+]; FREEMAIL_FROM(0.00)[gmail.com]; TO_DN_SOME(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FROM_HAS_DN(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::52f:from]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; MID_RHS_MATCH_FROMTLD(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MISSING_XM_UA(0.00)[]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org]; TAGGED_RCPT(0.00)[]; BLOCKLISTDE_FAIL(0.00)[2a00:1450:4864:20::52f:server fail]; RCVD_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; FREEMAIL_ENVFROM(0.00)[gmail.com] X-Rspamd-Queue-Id: 4dQ1bv5sqmz3VK2 On Sun, Dec 7, 2025 at 7:31=E2=80=AFPM Rozhuk Ivan wr= ote: > > On Sun, 7 Dec 2025 11:07:48 +0100 > Mateusz Guzik wrote: > > That is to say, if you have time, can you please benchmark a > > statically linked clang vs clang which merely reverting the libprivate > > change? Should be a small speed up on top. > > NO_SHARED - it was static link with libc and probably other system libs. > Now clang splitted into set of libs, it is a bit different thing. > It is indeed a different thing and I am saying it also likely reduces performance compared to what it can be without the recent libprivat problem. It very much warrants benchmarking.