From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: builds are getting slower? Date: Thu, 10 Dec 2015 18:16:50 +0200 Message-ID: <8337vab7nx.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1449764257 12370 80.91.229.3 (10 Dec 2015 16:17:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 10 Dec 2015 16:17:37 +0000 (UTC) Cc: emacs-devel@gnu.org To: Glenn Morris Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Dec 10 17:17:22 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1a73uD-00039l-SH for ged-emacs-devel@m.gmane.org; Thu, 10 Dec 2015 17:17:22 +0100 Original-Received: from localhost ([::1]:42743 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a73uD-00035l-24 for ged-emacs-devel@m.gmane.org; Thu, 10 Dec 2015 11:17:21 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37825) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a73tu-00035W-Ho for emacs-devel@gnu.org; Thu, 10 Dec 2015 11:17:03 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a73tq-0003fs-HL for emacs-devel@gnu.org; Thu, 10 Dec 2015 11:17:02 -0500 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:51676) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a73tq-0003fo-A2; Thu, 10 Dec 2015 11:16:58 -0500 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0NZ500F00GY9PQ00@a-mtaout21.012.net.il>; Thu, 10 Dec 2015 18:16:46 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NZ500F5LH7XMT70@a-mtaout21.012.net.il>; Thu, 10 Dec 2015 18:16:46 +0200 (IST) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:196022 Archived-At: > From: Glenn Morris > Date: Wed, 09 Dec 2015 21:15:38 -0500 > > Subjectively it felt to me lately like it was taking longer to build > Emacs than it used to. When I looked at my daily build logs, that seems > to be confirmed - see attached figure (time for a full bootstrap). > In particular, things seem to have gotten about 30% slower around 10th > November. Maybe (?) this is borne out by > http://hydra.nixos.org/job/gnu/emacs-trunk/tarball#tabs-charts > or maybe it isn't. Strange: the plot at Hydra doesn't seem to show any perceptible tendency towards longer times. If I draw an imaginary line to show the long-term average, it stays at about the same value. Or maybe I misunderstand the graphs there. I have a few questions: . Are these are builds from master or from emacs-25? . Is this reproducible? i.e., if you checkout what was HEAD on Nov 5, do you get bootstrap time around the values recorded for that date? . Did anything change in Hydra system configuration since the beginning of the year? I mean stuff like OS upgrades, changes in hardware (including disk drives), new versions of GCC and Binutils installed. . (Paul already asked this.) What are the configure-time and make-time options? are they identical in all these builds? I tried byte compiling large files, and I don't see more than 10% slowdown between some build near October end and a build a few days ago. I measured the same 10% in optimized and non-optimized builds (of course, absolute times are different). So this cannot explain a 30% increase in bootstrap time, at least not on my system. Can you try the same experiment on Hydra?