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: Thu, 03 Dec 2020 22:17:33 +0200 Message-ID: <83a6uufxuq.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21471"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Dec 03 21:18:44 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 1kkv3s-0005Sr-1M for ged-emacs-devel@m.gmane-mx.org; Thu, 03 Dec 2020 21:18:44 +0100 Original-Received: from localhost ([::1]:41172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkv3r-0006Uv-3k for ged-emacs-devel@m.gmane-mx.org; Thu, 03 Dec 2020 15:18:43 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37648) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkv35-00062s-N0 for emacs-devel@gnu.org; Thu, 03 Dec 2020 15:17:55 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50451) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkv34-0003Ay-UD; Thu, 03 Dec 2020 15:17:54 -0500 Original-Received: from [176.228.60.248] (port=1091 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kkv33-00005B-Sw; Thu, 03 Dec 2020 15:17:54 -0500 In-Reply-To: (message from Alan Mackenzie on Thu, 3 Dec 2020 18:15:30 +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:260239 Archived-At: > Date: Thu, 3 Dec 2020 18:15:30 +0000 > From: Alan Mackenzie > > I've got pretty much up to date copies of both the master and the > emacs-27 branches. > > When I run my customary benchmark (see below) on master's src/xdisp.c in > master, it's taking around 34s. On emacs-27, it's taking 22s. Optimized builds or unoptimized ones? In unoptimized builds I get almost no difference: Emacs 28 is about 4% slower than Emacs 27. And the profiles look almost identical.