From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Scrolling commands and skipping redisplay, was: Re: emacs rendering comparisson between emacs23 and emacs26.3 Date: Fri, 10 Apr 2020 16:38:05 +0300 Message-ID: <83o8rzmpfm.fsf@gnu.org> References: <20200403174757.GA8266@ACM> <20200404104553.GA5329@ACM> <07fe3b69-3ab2-3173-0696-cb17809e2b91@gmx.at> <83blo7v68b.fsf@gnu.org> <1845d7aa-9ae4-3d95-6a30-c7b1d8d8adec@gmx.at> <83a73qt6zs.fsf@gnu.org> <97c4254e-ff43-8402-3645-f713c408c245@gmx.at> <83y2r9syby.fsf@gnu.org> <20200405195753.GG5049@ACM> <542b48ba-4dfa-820f-ba50-4b147ab6d8e2@yandex.ru> <0a5f70aa-4985-8f8d-81d6-6ac4a60a94f9@yandex.ru> <838sj8sphk.fsf@gnu.org> <834ktwsmfw.fsf@gnu.org> <83imibqsmm.fsf@gnu.org> <478c2aab-a5fc-61c2-02e2-2d9846b95273@yandex.ru> <83v9m9nltx.fsf@gnu.org> <83tv1rn8fx.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="65027"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, emacs-devel@gnu.org, rudalics@gmx.at, rrandresf@gmail.com, dgutov@yandex.ru, acm@muc.de To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Apr 10 15:39:58 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 1jMtsz-000Gnl-UR for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 15:39:57 +0200 Original-Received: from localhost ([::1]:34496 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMtsy-0006eY-UN for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 09:39:56 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44758) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMtre-0005Dn-Tz for emacs-devel@gnu.org; Fri, 10 Apr 2020 09:38:44 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50821) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jMtrc-0004aw-Rd; Fri, 10 Apr 2020 09:38:32 -0400 Original-Received: from [176.228.60.248] (port=4489 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jMtrU-0005je-8d; Fri, 10 Apr 2020 09:38:25 -0400 In-Reply-To: (message from Stefan Monnier on Fri, 10 Apr 2020 09:00:04 -0400) 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:246751 Archived-At: > From: Stefan Monnier > Cc: Dmitry Gutov , acm@muc.de, rrandresf@gmail.com, > emacs-devel@gnu.org, rms@gnu.org, rudalics@gmx.at > Date: Fri, 10 Apr 2020 09:00:04 -0400 > > > Depends on what you mean by "precision". They might very well miss > > some parts of the buffer entirely, i.e. never see them on display. > > But that happens regardless of whether the scroll is computed correctly, > because redisplay itself is skipped. It isn't skipped here if I use jit-lock-defer-time. Maybe your keyboard auto-repeat rate is too high? Mine is set to about 50/sec. > > This may or may not be important, depending on the use case. An > > editor is not supposed to skip portions of the buffer when scrolling > > continuously. > > If we can arrange for the "skip jit-lock during scroll" to ensure that > the subsequent redisplay also skips jit-lock (or is itself skipped), > then this should not happen, right? > E.g. in the case where jit-lock-defer-time > 0. Indeed, it doesn't here. > > Here, it behaves much better. So maybe some other factors are at work > > in your configuration. > > I think different definitions of "better" are at play here as well. In the context of the above, "better" means "without flickering".