From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: cc-mode: recent performance issues? Date: Tue, 9 Nov 2021 18:12:08 +0000 Message-ID: References: <87mtmd1drr.fsf@wavexx.thregr.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4377"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Yuri D'Elia Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Nov 09 19:13:55 2021 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 1mkVd5-00010h-2d for ged-emacs-devel@m.gmane-mx.org; Tue, 09 Nov 2021 19:13:55 +0100 Original-Received: from localhost ([::1]:47404 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mkVd3-0006rf-9R for ged-emacs-devel@m.gmane-mx.org; Tue, 09 Nov 2021 13:13:53 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:49560) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkVbg-0005lP-9P for emacs-devel@gnu.org; Tue, 09 Nov 2021 13:12:28 -0500 Original-Received: from colin.muc.de ([193.149.48.1]:40694 helo=mail.muc.de) by eggs.gnu.org with smtp (Exim 4.90_1) (envelope-from ) id 1mkVbe-00048m-0u for emacs-devel@gnu.org; Tue, 09 Nov 2021 13:12:28 -0500 Original-Received: (qmail 94912 invoked by uid 3782); 9 Nov 2021 18:12:09 -0000 Original-Received: from acm.muc.de (p4fe1582d.dip0.t-ipconnect.de [79.225.88.45]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 09 Nov 2021 19:12:09 +0100 Original-Received: (qmail 9635 invoked by uid 1000); 9 Nov 2021 18:12:08 -0000 Content-Disposition: inline In-Reply-To: <87mtmd1drr.fsf@wavexx.thregr.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.1; envelope-from=acm@muc.de; helo=mail.muc.de 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_NONE=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: 2.1.29 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:279118 Archived-At: Hello, Yuri. On Tue, Nov 09, 2021 at 17:42:48 +0100, Yuri D'Elia wrote: > I noticed a relatively recent performance issue in cc-mode. > Try opening the following attached file, which is a random c++ piece of > code containing some template-heavy function repeated multiple times. > In emacs -q -nw, try to scroll down a bit, then up. Emacs gets busy in a > display loop. > Under x11/lucid (emacs/lucid with NATIVE_FULL_AOT=1), it's a bit more > responsive at first, but still gets stuck in the display loop to the > point of being unusable after a few seconds. I'm still diagnosing this. As a temporary workaround, please try (setq c-type-finder-time-slot nil) .. -- Alan Mackenzie (Nuremberg, Germany).