From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: The Emacs master is much slower than the emacs-27 branch. Date: Sat, 05 Dec 2020 11:20:01 +0200 Message-ID: <83ft4kd2ym.fsf@gnu.org> References: <877dpyzg9d.fsf@rub.de> <87czzpsyqn.fsf@gmx.net> <83o8j9eqwx.fsf@gnu.org> <874kl1spe9.fsf@gmx.net> <83blf9em55.fsf@gnu.org> <87zh2tr82r.fsf@gmx.net> <87v9dhr7i5.fsf@gmx.net> <838sadefiw.fsf@gnu.org> <83360le421.fsf@gnu.org> <83y2idcn8q.fsf@gnu.org> <83wnxxcmjr.fsf@gnu.org> <83tut0d7e9.fsf@gnu.org> <83h7p0d37y.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="28374"; mail-complaints-to="usenet@ciao.gmane.io" To: ghe@sdf.org, acm@muc.de, stephen.berman@gmx.net, emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Dec 05 10:21:25 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1klTkq-0007I8-WE for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Dec 2020 10:21:25 +0100 Original-Received: from localhost ([::1]:34866 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1klTkq-0001XD-1m for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Dec 2020 04:21:24 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33104) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1klTjl-0000dm-SE for emacs-devel@gnu.org; Sat, 05 Dec 2020 04:20:18 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:43318) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1klTjk-0003aI-S1; Sat, 05 Dec 2020 04:20:16 -0500 Original-Received: from [176.228.60.248] (port=1922 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1klTjk-0001k4-FE; Sat, 05 Dec 2020 04:20:16 -0500 In-Reply-To: <83h7p0d37y.fsf@gnu.org> (message from Eli Zaretskii on Sat, 05 Dec 2020 11:14:25 +0200) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:260346 Archived-At: > Date: Sat, 05 Dec 2020 11:14:25 +0200 > From: Eli Zaretskii > Cc: acm@muc.de, stephen.berman@gmx.net, emacs-devel@gnu.org > > I wasn't going to ask that, but I would like to point out one more > potential difference: I didn't compare two builds of master before and > after that commit. Instead, I timed 32-bit builds of the current > emacs-27 and master branches which were both built with the following > optional switches to configure: > > --with-wide-int --with-modules --enable-checking=yes,glyphs 'CFLAGS=-O0 -gdwarf-4 -g3' > > Again, I don't expect any of this to matter so dramatically, so this > is just for completeness' sake. And one more nit, again for completeness' sake: in both cases I timed the scrolling through the master branch version of xdisp.c, not each branch with its version of xdisp.c.