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: Thu, 28 Nov 2019 14:22:07 +1300 Message-ID: <39c498717f8958e7fdc408d4da51d378@webmail.orcon.net.nz> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="4507"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Orcon Webmail Cc: 38407@debbugs.gnu.org To: Pieter van Oostrum Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Nov 28 02:23:11 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 1ia8WU-00011O-V7 for geb-bug-gnu-emacs@m.gmane.org; Thu, 28 Nov 2019 02:23:11 +0100 Original-Received: from localhost ([::1]:44522 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia8WT-000621-Le for geb-bug-gnu-emacs@m.gmane.org; Wed, 27 Nov 2019 20:23:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50452) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia8WN-00061r-O6 for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 20:23:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ia8WM-0007bb-On for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 20:23:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50483) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ia8WM-0007bI-L6 for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 20:23:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ia8WM-000756-HB for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 20:23:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Phil Sainty Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 28 Nov 2019 01:23:02 +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=B38407.157490413327133 (code B ref 38407); Thu, 28 Nov 2019 01:23:02 +0000 Original-Received: (at 38407) by debbugs.gnu.org; 28 Nov 2019 01:22:13 +0000 Original-Received: from localhost ([127.0.0.1]:56456 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ia8VZ-00073Y-Cp for submit@debbugs.gnu.org; Wed, 27 Nov 2019 20:22:13 -0500 Original-Received: from smtp-4.orcon.net.nz ([60.234.4.59]:57017) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ia8VW-00073P-Jg for 38407@debbugs.gnu.org; Wed, 27 Nov 2019 20:22:11 -0500 Original-Received: from [10.253.37.70] (port=35163 helo=webmail.orcon.net.nz) by smtp-4.orcon.net.nz with esmtpa (Exim 4.90_1) (envelope-from ) id 1ia8VT-0007h2-JU; Thu, 28 Nov 2019 14:22:07 +1300 Original-Received: from wlgwil-nat-office.catalyst.net.nz ([202.78.240.7]) via [10.253.37.253] by webmail.orcon.net.nz with HTTP (HTTP/1.1 POST); Thu, 28 Nov 2019 14:22:07 +1300 In-Reply-To: X-Sender: psainty@orcon.net.nz X-GeoIP: -- 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:172576 Archived-At: On 2019-11-28 10:52, Pieter van Oostrum wrote: > I used a 100KB json file from my Firefox profile Out of interest I went looking for large JSON files in my own Firefox profiles, and the largest one I could find was an "extensions.json" which was also roughly 100K. Curiously enough, everything was indeed dramatically slower than normal in that buffer, even in so-long-mode. I also observed that many different human languages were present in the text, so I thought that bi-directional text processing might be a factor -- and indeed setting the debug option bidi-display-reordering to nil in that buffer made a *very* dramatic improvement to performance. Similarly, performance was good after using M-x find-file-literally to visit the file. I am guessing that this is also what is happening for you? -Phil