From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id kLUsLlHO3F81IwAA0tVLHw (envelope-from ) for ; Fri, 18 Dec 2020 15:44:17 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id cLnjKVHO3F+SVQAAbx9fmQ (envelope-from ) for ; Fri, 18 Dec 2020 15:44:17 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 84CEB9402A8 for ; Fri, 18 Dec 2020 15:44:17 +0000 (UTC) Received: from localhost ([::1]:39228 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kqHvU-0004VH-F5 for larch@yhetil.org; Fri, 18 Dec 2020 10:44:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59296) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kqHli-0002Kp-Ca for guix-devel@gnu.org; Fri, 18 Dec 2020 10:34:10 -0500 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:53233) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kqHla-00045P-95; Fri, 18 Dec 2020 10:34:05 -0500 X-Originating-IP: 91.165.152.159 Received: from mimimi (91-165-152-159.subs.proxad.net [91.165.152.159]) (Authenticated sender: mail@ambrevar.xyz) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 40EB5C000D; Fri, 18 Dec 2020 15:33:55 +0000 (UTC) From: Pierre Neidhardt To: Ludovic =?utf-8?Q?Court=C3=A8s?= Subject: Re: When substitute download + decompression is CPU-bound In-Reply-To: <87lfdvb1n7.fsf@gnu.org> References: <87im94qbby.fsf@gnu.org> <87sg88ngd1.fsf@guixSD.i-did-not-set--mail-host-address--so-tickle-me> <871rfrld59.fsf@ambrevar.xyz> <87blevmh2l.fsf@gnu.org> <87sg879rok.fsf@ambrevar.xyz> <87lfdvb1n7.fsf@gnu.org> Date: Fri, 18 Dec 2020 16:33:54 +0100 Message-ID: <87o8irku1p.fsf@ambrevar.xyz> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Received-SPF: pass client-ip=217.70.183.198; envelope-from=mail@ambrevar.xyz; helo=relay6-d.mail.gandi.net X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, FROM_SUSPICIOUS_NTLD=0.122, PDS_OTHER_BAD_TLD=1.999, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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 , =?utf-8?Q?Nicol=C3=B2?= Balzarotti Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -4.42 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; 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: 84CEB9402A8 X-Spam-Score: -4.42 X-Migadu-Scanner: scn0.migadu.com X-TUID: hnYrEqslFyyk --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Ludovic Court=C3=A8s writes: > My laptop has 4 cores, so at best I=E2=80=99d get a 4x speedup, compared = to the > 10x speedup with zstd that also comes with much lower resource usage, > etc. Of course, it's a trade off between high compression and high speed=C2=A0:) Since there is no universal best option, I think it's best to support both. > Would you like to give parallel lzip a try? It shouldn't be too hard for me considering I already have experience with Lzip, but I can only reasonably do this after FOSDEM, so in 1.5 month from now. If I forget, please ping me ;) If there is any taker before that, please go ahead! :) =2D-=20 Pierre Neidhardt https://ambrevar.xyz/ --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQFGBAEBCAAwFiEEUPM+LlsMPZAEJKvom9z0l6S7zH8FAl/cy+ISHG1haWxAYW1i cmV2YXIueHl6AAoJEJvc9Jeku8x/5dAH/ia0eAdVoETlI9Qqsnm56bYRP7XyeN4N C92jOjPz4o2NNNqvag6zIXJTxTyEMz2S5lxbYMkKXvotVD4sM4+TV7PP+IPAGqWx l0XVNUgtQFkBvLc5FltZRLBVXDp62LJiJ4aMCJlMd9NILMeAQ9D+jJ66vXAplBZq AuOEeCPGQlVfr69kuJPVabCF3tfFBKLv/OX4MN4mvDcX+/e8X8KJKiCTNHi70h9N jwkY4Vux7KoLUjWhNuYaYdEG5dLk2drtC/2MTeceLeq7JmgLNSFoa2GCMr2+1DCs RqIdVCl0w1coXgrEo7VxdZ2jBpDT1dX/8e9lwwBE2eWY0UOwnbnS9PA= =xfcG -----END PGP SIGNATURE----- --=-=-=--