From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tobias Geerinckx-Rice Subject: Re: 02/02: image: Disable compression for ISO images. Date: Mon, 27 Apr 2020 17:13:18 +0200 Message-ID: <87blndt116.fsf@nckx> References: <20200427140924.28752.28126@vcs0.savannah.gnu.org> <20200427140926.3B6CF20B7A@vcs0.savannah.gnu.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Return-path: Received: from eggs.gnu.org ([2001:470:142:3::10]:35178) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jT5Rd-00072j-Eq for guix-devel@gnu.org; Mon, 27 Apr 2020 11:13:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jT5Rc-0003K5-I3 for guix-devel@gnu.org; Mon, 27 Apr 2020 11:13:16 -0400 Received: from tobias.gr ([2a02:c205:2020:6054::1]:46930) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jT5Ra-0003J9-KU for guix-devel@gnu.org; Mon, 27 Apr 2020 11:13:16 -0400 In-reply-to: <20200427140926.3B6CF20B7A@vcs0.savannah.gnu.org> 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+gcggd-guix-devel=m.gmane-mx.org@gnu.org Sender: "Guix-devel" To: Mathieu Othacehe Cc: Guix-devel --=-=-= Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Mathieu, guix-commits@gnu.org =E5=86=99=E9=81=93=EF=BC=9A > + ;; XXX: Temporarily disable compression to speed-up the=20 > tests. > + (compression? #f))) Interesting! What kind of improvement do you see, roughly? When I added zlib compression I was surprised to learn that here=20 it made no significant difference in wall clock time (less than a=20 minute; 5% or so) or CPU time. The disks they spin and CPU she is=20 fast, but still I would have noticed a spike. Kind regards, T G-R --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQT12iAyS4c9C3o4dnINsP+IT1VteQUCXqb2jgAKCRANsP+IT1Vt eWrOAP4qCeRBVHVP04QD+/ynPKy+7q63ZbVIbG8/ngwNL6CCgwEA3dprI/NmqA9q kzHCXiuBbpIBiqaIa86jzPJlgzKTQgQ= =K6n/ -----END PGP SIGNATURE----- --=-=-=--