From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings via "Emacs development discussions." Newsgroups: gmane.emacs.devel Subject: Re: The Emacs master is much slower than the emacs-27 branch. Date: Sat, 05 Dec 2020 15:39:51 +0000 Message-ID: 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> <8c5fe90c-72ca-a2c3-29d2-1849458bb85a@gmx.at> <87wnxwwbqz.fsf@telefonica.net> <93719f51-14d1-2084-ce04-221344043721@gmx.at> Reply-To: Gregory Heytings Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16700"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Alpine 2.22 (NEB 394 2020-01-19) Cc: =?ISO-8859-15?Q?=D3scar_Fuentes?= , emacs-devel@gnu.org To: martin rudalics Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Dec 05 16:40:42 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 1klZfu-0004G2-G0 for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Dec 2020 16:40:42 +0100 Original-Received: from localhost ([::1]:39142 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1klZft-0005Lq-Ha for ged-emacs-devel@m.gmane-mx.org; Sat, 05 Dec 2020 10:40:41 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38430) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1klZfJ-0004r6-2K for emacs-devel@gnu.org; Sat, 05 Dec 2020 10:40:05 -0500 Original-Received: from mx.sdf.org ([205.166.94.24]:59391) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1klZfH-0004pv-9D for emacs-devel@gnu.org; Sat, 05 Dec 2020 10:40:04 -0500 Original-Received: from sdf.org (IDENT:ghe@faeroes.freeshell.org [205.166.94.9]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 0B5FdrgL026530 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Sat, 5 Dec 2020 15:39:54 GMT Original-Received: (from ghe@localhost) by sdf.org (8.15.2/8.12.8/Submit) id 0B5FeTqd028466; Sat, 5 Dec 2020 15:40:29 GMT In-Reply-To: Received-SPF: pass client-ip=205.166.94.24; envelope-from=ghe@sdf.org; helo=mx.sdf.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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:260374 Archived-At: > > Sorry. I'm still too dumb to understand > No, you are definitely not! :-) > > so I ask the following instead: > > (1) I can always compare -O1, -O2 and -O3 builds because these were > _not_ affected by Paul's changes. Right? > Yes. > > (2) I cannot compare -Og builds because these _are_ affected by Paul's > changes. At least Emacs 27 vs Emacs non-27 ones. Right? > Yes. > > (3) I'm yet unsure about -O0 builds. Are they (1)- or (2)-like? > Like (2), at least with GCC on 64-bit GNU/Linux. Apparently Eli does not see this on MS-Windows.