From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: emacs rendering comparisson between emacs23 and emacs26.3 Date: Wed, 01 Apr 2020 22:32:12 -0400 Message-ID: References: <86tv2h2vww.fsf@gmail.com> <20200322123818.GB32470@ACM> <87eetk5swm.fsf@gnu.org> <20200326193128.GC14092@ACM> <86d08y4zsx.fsf@gmail.com> <83sghs7qdz.fsf@gnu.org> <83h7y63sjj.fsf@gnu.org> <834ku43c61.fsf@gnu.org> <83k12zz6ds.fsf@gnu.org> Reply-To: rms@gnu.org Content-Type: text/plain; charset=Utf-8 Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="84342"; mail-complaints-to="usenet@ciao.gmane.io" Cc: acm@muc.de, rrandresf@gmail.com, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Apr 02 04:33:33 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 1jJpfh-000LqQ-C8 for ged-emacs-devel@m.gmane-mx.org; Thu, 02 Apr 2020 04:33:33 +0200 Original-Received: from localhost ([::1]:60826 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJpfg-0005q1-EL for ged-emacs-devel@m.gmane-mx.org; Wed, 01 Apr 2020 22:33:32 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58330) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJpeR-0004RN-AS for emacs-devel@gnu.org; Wed, 01 Apr 2020 22:32:16 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:47810) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jJpeQ-0005Z5-Rj; Wed, 01 Apr 2020 22:32:14 -0400 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.82) (envelope-from ) id 1jJpeO-0004Xf-AO; Wed, 01 Apr 2020 22:32:12 -0400 In-Reply-To: <83k12zz6ds.fsf@gnu.org> (message from Eli Zaretskii on Wed, 01 Apr 2020 16:23:59 +0300) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:246231 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > 1. If the slowdown cases are truly rare, I don't think they will bother > > users very often. > A frequent case is that the use case is rare on the average, but for > some user(s) it is not so rare. Yes. I don't think we can attain perfection, so I'm suggesting a guideline so we can do better overall without too much extra work. > I think we do try: patch review frequently has these aspects > discussed. But it is a well known fact that humans are lousy > predictors of code speed. I'm not suggesting we try to _predict_ the effect on code speed, rather than we have a guideline to identify the cases where _if_ the code gets slower it would be hard for a user to escape that. What we would do, in those cases, is add a switch to turn off the changes. -- Dr Richard Stallman Chief GNUisance of the GNU Project (https://gnu.org) Founder, Free Software Foundation (https://fsf.org) Internet Hall-of-Famer (https://internethalloffame.org)