From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Phil Sainty Newsgroups: gmane.emacs.bugs Subject: bug#38407: 27.0.50; infinite loop with display of large file without newlines Date: Sat, 30 Nov 2019 00:48:22 +1300 Message-ID: <5b3e77c9-98e9-2874-8944-cfd9a3c414a6@orcon.net.nz> References: <39c498717f8958e7fdc408d4da51d378@webmail.orcon.net.nz> <24031.28277.201123.531348@cochabamba.vanoostrum.org> <83r21sowx1.fsf@gnu.org> <24032.4698.256238.87458@cochabamba.vanoostrum.org> <83k17jq1ch.fsf@gnu.org> <24032.17845.921546.629745@cochabamba.vanoostrum.org> <83fti7p349.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="256491"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 Cc: Pieter van Oostrum , 38407@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Nov 29 13:21:03 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iafGh-0014ZP-5l for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Nov 2019 13:21:03 +0100 Original-Received: from localhost ([::1]:58204 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iafGg-0008Vt-1S for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Nov 2019 07:21:02 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58350) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iaeln-0001de-RY for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2019 06:49:11 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iaeli-0006gi-Qh for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2019 06:49:04 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:53669) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iaeli-0006eY-3O for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2019 06:49:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iaelh-0006Zz-UB for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2019 06:49:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Phil Sainty Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 29 Nov 2019 11:49:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38407 X-GNU-PR-Package: emacs Original-Received: via spool by 38407-submit@debbugs.gnu.org id=B38407.157502811125251 (code B ref 38407); Fri, 29 Nov 2019 11:49:01 +0000 Original-Received: (at 38407) by debbugs.gnu.org; 29 Nov 2019 11:48:31 +0000 Original-Received: from localhost ([127.0.0.1]:59642 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iaelC-0006ZC-UA for submit@debbugs.gnu.org; Fri, 29 Nov 2019 06:48:31 -0500 Original-Received: from smtp-2.orcon.net.nz ([60.234.4.43]:36121) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iael9-0006Z2-Rt for 38407@debbugs.gnu.org; Fri, 29 Nov 2019 06:48:28 -0500 Original-Received: from [116.251.203.246] (port=31087 helo=[192.168.20.103]) by smtp-2.orcon.net.nz with esmtpa (Exim 4.90_1) (envelope-from ) id 1iael4-0006LX-GL; Sat, 30 Nov 2019 00:48:22 +1300 In-Reply-To: <83fti7p349.fsf@gnu.org> Content-Language: en-GB X-GeoIP: NZ X-Spam_score: -2.9 X-Spam_score_int: -28 X-Spam_bar: -- X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:172638 Archived-At: I've just pulled from master and recompiled, and in my own tests setting bidi-inhibit-bpa to t improves performance greatly. On my machine, with the particular extensions.json file I'm using: * In js-mode, scrolling at the end of the file incurs a ~6s delay. * In so-long-mode (without bidi-inhibit-bpa), the same thing incurs a ~5s delay -- not much of an improvement. * After setting bidi-inhibit-bpa to t in so-long-variable-overrides and revisiting the file, the same thing incurs only a ~1s delay. * Using M-: (setq-local bidi-inhibit-bpa t) in json-mode (i.e. without using so-long) likewise makes things a great deal faster (but the combination with so-long is better still). Scrolling at the top of the file in so-long-mode with the new option set is more or less instantaneous. Without the new option that is also quite slow (if not to the same extent as the end of the file). In short, this enhancement seems very effective to me (thank you Eli), so I will push the addition to so-long.el shortly. -Phil