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[194.254.61.45]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-432b05e5f77sm33594265e9.43.2024.11.07.09.54.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2024 09:54:45 -0800 (PST) From: Simon Tournier To: Ludovic =?utf-8?Q?Court=C3=A8s?= , "Thompson, David" Cc: Evan Cooney , guix-devel Subject: Re: Possible useful guix package performance data In-Reply-To: <87ikt23aie.fsf@gnu.org> References: <87ikt23aie.fsf@gnu.org> Date: Thu, 07 Nov 2024 16:14:17 +0100 Message-ID: <871pznjcty.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::32b; envelope-from=zimon.toutoune@gmail.com; helo=mail-wm1-x32b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Spam-Score: -1.46 X-Spam-Score: -1.46 X-Migadu-Queue-Id: 172EB8AAAC X-Migadu-Scanner: mx12.migadu.com X-TUID: mGEYD70G8DsP Hi, On Mon, 04 Nov 2024 at 23:22, Ludovic Court=C3=A8s wrote: > Garbage collection statistics: > heap size: 72.27 MiB > allocated: 100.29 MiB > GC times: 13 > time spent in GC: 0.42 seconds (45% of user time) I am puzzled by this. Well, most of the time when the garbage collection takes a relative amount of time compared to the whole task, it potentially means some allocations are poorly designed. How could I inspect that? Cheers, simon