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 16:34:01 +0300 Message-ID: <83pncfmpme.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> <4c5ebff1-39ab-3d63-6118-42befc93b862@yandex.ru> <6914ebb2-2dfa-efdc-1181-c42259219bca@yandex.ru> <83zhbjna0q.fsf@gnu.org> <903b7d31-bd0e-e2dc-a981-d090ed959ccb@yandex.ru> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="45120"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, emacs-devel@gnu.org, rudalics@gmx.at, rrandresf@gmail.com, monnier@iro.umontreal.ca, acm@muc.de To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Apr 10 15:35:15 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 1jMtoP-000BcZ-KO for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 15:35:13 +0200 Original-Received: from localhost ([::1]:34418 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMtoO-0002b8-O5 for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Apr 2020 09:35:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44272) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMtnk-0002B4-2Z for emacs-devel@gnu.org; Fri, 10 Apr 2020 09:34:33 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50771) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jMtni-000314-Vm; Fri, 10 Apr 2020 09:34:31 -0400 Original-Received: from [176.228.60.248] (port=4243 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jMtnb-0005FK-Iu; Fri, 10 Apr 2020 09:34:24 -0400 In-Reply-To: <903b7d31-bd0e-e2dc-a981-d090ed959ccb@yandex.ru> (message from Dmitry Gutov on Fri, 10 Apr 2020 15:38:05 +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:246750 Archived-At: > Cc: monnier@iro.umontreal.ca, acm@muc.de, rrandresf@gmail.com, > emacs-devel@gnu.org, rms@gnu.org, rudalics@gmx.at > From: Dmitry Gutov > Date: Fri, 10 Apr 2020 15:38:05 +0300 > > But I'm comparing fast-but-imprecise-scrolling with jit-lock-defer-time > set to 0, which is supposed to be its direct counterpart. And the latter > adds flickering. > > Higher values add flickering too, even more noticeably. But that seems > unavoidable. It doesn't flicker here. Maybe the double-buffering is the reason? With -Og, if you set jit-lock-defer-time to 0.5, doesn't it scroll much faster? does it flicker then?