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: Fri, 04 Dec 2020 22:47:17 +0200 Message-ID: <83y2idcn8q.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> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27124"; mail-complaints-to="usenet@ciao.gmane.io" Cc: acm@muc.de, stephen.berman@gmx.net, emacs-devel@gnu.org To: Gregory Heytings Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Dec 04 21:52:20 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 1klI3v-0006vG-PJ for ged-emacs-devel@m.gmane-mx.org; Fri, 04 Dec 2020 21:52:19 +0100 Original-Received: from localhost ([::1]:38778 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1klI3u-0002If-Om for ged-emacs-devel@m.gmane-mx.org; Fri, 04 Dec 2020 15:52:18 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41296) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1klHzP-0007Sd-Jf for emacs-devel@gnu.org; Fri, 04 Dec 2020 15:47:39 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:58119) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1klHzM-0006lg-H4; Fri, 04 Dec 2020 15:47:36 -0500 Original-Received: from [176.228.60.248] (port=3730 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1klHzJ-0008Fq-Gh; Fri, 04 Dec 2020 15:47:35 -0500 In-Reply-To: (message from Gregory Heytings on Fri, 04 Dec 2020 20:33:21 +0000) 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:260316 Archived-At: > Date: Fri, 04 Dec 2020 20:33:21 +0000 > From: Gregory Heytings > cc: stephen.berman@gmx.net, acm@muc.de, emacs-devel@gnu.org > > >> I bisected this, and the origin of the regression is commit > >> 365dad197bac5deec9244fd9c189d23c46c99b31, which changes the default to > >> "use 'static' instead of 'extern inline' [in C headers] because > >> 'static' typically has better performance for Emacs". With -Og or -O0, > >> the benchmark takes 67 seconds, with -O1 or above (-O2 is the default) > >> it takes 25 seconds. > > > > Thanks, then I think there''s no issue here, and we can stop wondering > > about the difference in performance. > > There's no issue indeed, but it might make sense to merge commit > b9b32074cecb0e0d20cf527eadacbb0b7f5cced9 into emacs-27. No, because emacs-27 only receives bugfixes at this time, and safe ones at that.