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[87.4.165.57]) by smtp.gmail.com with ESMTPSA id p9sm12989471wrj.11.2021.01.29.03.55.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Jan 2021 03:55:16 -0800 (PST) From: =?utf-8?Q?Nicol=C3=B2?= Balzarotti To: Guillaume Le Vaillant , Pierre Neidhardt Subject: Re: When substitute download + decompression is CPU-bound In-Reply-To: <874kj0x9yv.fsf@yamatai> References: <87im94qbby.fsf@gnu.org> <94405d66-b13c-e6e6-e8d5-df23b93e5d97@web.de> <87im92voqw.fsf@dismail.de> <87ft3d2fge.fsf@yamatai> <87bldr191v.fsf@gnu.org> <87h7ni62nt.fsf@ambrevar.xyz> <87bld9j651.fsf@gnu.org> <87eei4rs8x.fsf@ambrevar.xyz> <874kj0x9yv.fsf@yamatai> Date: Fri, 29 Jan 2021 12:55:15 +0100 Message-ID: <87mtwsarfg.fsf@guixSD.i-did-not-set--mail-host-address--so-tickle-me> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=anothersms@gmail.com; helo=mail-wm1-x329.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: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: guix-devel@gnu.org Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -3.05 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=IXIqYmxH; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 5C3249403AC X-Spam-Score: -3.05 X-Migadu-Scanner: scn0.migadu.com X-TUID: 2+GT8emb6KfS Guillaume Le Vaillant writes: > Here are a few numbers for the installation time in seconds (download > time + decompression time) when fetching 580 MB of substitutes for > download speeds between 0.5 MB/s and 20 MB/s. Which hardware did you use? Since you are fixing the download speed, those results really depend on cpu speed. > As Gzip is never the best choice, it would make sense to drop it, even > if we have to wait a little until everyone has updated their Guix daemon My hypothesis is that this won't be the case on something slow like the raspberry pi 1.