From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Scrolling commands and skipping redisplay, was: Re: emacs rendering comparisson between emacs23 and emacs26.3 Date: Sun, 12 Apr 2020 01:03:55 -0400 Message-ID: References: <20200403174757.GA8266@ACM> <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> <83pncfmpme.fsf@gnu.org> <94ee576f-ff26-cad9-3e22-b75299ff9cdb@yandex.ru> <37afe0b1-7763-4d63-3dc2-5b20415207fe@yandex.ru> <38cbd9b4-cd22-1b40-c756-71de78b97e5f@yandex.ru> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="108395"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: rms@gnu.org, emacs-devel@gnu.org, rudalics@gmx.at, rrandresf@gmail.com, acm@muc.de, Eli Zaretskii To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Apr 12 07:04:37 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 1jNUnN-000S7J-0P for ged-emacs-devel@m.gmane-mx.org; Sun, 12 Apr 2020 07:04:37 +0200 Original-Received: from localhost ([::1]:58890 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jNUnM-0000wE-3k for ged-emacs-devel@m.gmane-mx.org; Sun, 12 Apr 2020 01:04:36 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55934) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jNUmo-0000GN-Vg for emacs-devel@gnu.org; Sun, 12 Apr 2020 01:04:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jNUmn-0006Tl-If for emacs-devel@gnu.org; Sun, 12 Apr 2020 01:04:02 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:18120) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jNUmm-0006TC-1y; Sun, 12 Apr 2020 01:04:00 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id D4EFA80EA4; Sun, 12 Apr 2020 01:03:58 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id E449880BB6; Sun, 12 Apr 2020 01:03:56 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1586667836; bh=4/IC8RCeccvO/LJ+C3A3XbSllfNgyzuCdZb5bQX2g+4=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=QkOOut2NVNfCpFREXUHXp5vjU+x45arPKflGYNt5zWS98koWgRQXx+r9uBR/Yo0DX VfC8AG/I/TXMqQ07AlInaD31LVndiSaTFodHa6fM7zOYArDjD+GOhEekRzDbcE+2IC J/w6QJNTjQK5gxdN0hfvbDdvEj/c2pV8NrEisZBpGB5p7kHCCxSMf1Cocwb9c0O5kp Aet0YmHqQI44BZpPHv2j/Zls/+cxaipOnZ51j4LGca1+6ZMTvMoOWkt4n7Ch6eaVc7 443T4FC5U5gJyJkPLNs6rsX9prDzgMnPSuCEgi5ZChlLzaTnqjB9OtUGiTxPnYRwlZ MCPILc+A2AZ9Q== Original-Received: from alfajor (unknown [104.247.241.114]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 8C4D1120769; Sun, 12 Apr 2020 01:03:56 -0400 (EDT) In-Reply-To: <38cbd9b4-cd22-1b40-c756-71de78b97e5f@yandex.ru> (Dmitry Gutov's message of "Sun, 12 Apr 2020 00:32:42 +0300") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 132.204.25.50 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:246854 Archived-At: >> Normally, input_was_pending should be the same during scroll than during >> the subsequent redisplay, so there should not be any loss of precision, no. > No, the same loss of precision as associated with f-b-i-s. Since font-lock > won't occur while scrolling, whatever different-sized fonts, etc, that could > be applied, won't be. So the scrolling positions will be imprecise. It is precise in the sense that it will skip exactly the amount corresponding to what is displayed. Because jit-lock is skipped, what is displayed is different, but the scrolling itself is "precise". Stefan