From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: How to debug memory leaks Date: Fri, 26 Mar 2021 12:25:05 -0400 Message-ID: References: <87pmzmihyj.fsf@robertthorpeconsulting.com> <83lfaaot5h.fsf@gnu.org> <83k0puorpb.fsf@gnu.org> <83ft0hq4wb.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2128"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:QI8nV96eYXTTNO3G4GvUT3QQVic= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Mar 26 17:26:13 2021 Return-path: Envelope-to: geh-help-gnu-emacs@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 1lPpHp-0000Rk-27 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 26 Mar 2021 17:26:13 +0100 Original-Received: from localhost ([::1]:57392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lPpHo-000494-2e for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 26 Mar 2021 12:26:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57562) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lPpGt-000479-6e for help-gnu-emacs@gnu.org; Fri, 26 Mar 2021 12:25:15 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:48626) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lPpGr-0005Y5-Mc for help-gnu-emacs@gnu.org; Fri, 26 Mar 2021 12:25:14 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lPpGo-0009mX-9i for help-gnu-emacs@gnu.org; Fri, 26 Mar 2021 17:25:10 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128651 Archived-At: > No, no, I don't mean that some modes don't need undo. I mean, if I am > working in a buffer, say some C file, and I think Emacs get sluggish, I > could do some M-x clean-buffer and have it setq bunch of variables to > nil, amongst them undo so GC can collect them. It is just that these > variables might be different depending of type of buffer, active modes > etc. I suspect that it would be "ineffective by design": in order to realize that such-and-such setting might solve a performance problem, you'll generally need first to be aware of that performance problem, and usually once you're aware of it you can just fix the problem itself. E.g. I don't think flushing buffer-undo-list will ever help with sluggishness. > Ok, I didn't know I can use post-command-hook for that. I'll try and > play with it. Thanks. Note also that if you want to make Emacs sluggish, a good place to start is by adding stuff to post-command-hook ;-) Stefan