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 13:30:12 +1300 Message-ID: <9836460c3f44ddd0436f4b55bf5f73b6@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="115894"; 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 01:43:57 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 1ia7uW-000U0W-HT for geb-bug-gnu-emacs@m.gmane.org; Thu, 28 Nov 2019 01:43:56 +0100 Original-Received: from localhost ([::1]:44378 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia7uV-0004x6-C3 for geb-bug-gnu-emacs@m.gmane.org; Wed, 27 Nov 2019 19:43:55 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51809) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ia7tQ-0004JF-CL for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 19:42:49 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ia7i6-000305-MF for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 19:31:07 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50461) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ia7i2-0002xQ-5t for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 19:31:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ia7i2-0005hQ-2k for bug-gnu-emacs@gnu.org; Wed, 27 Nov 2019 19:31:02 -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 00:31:02 +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=B38407.157490101721847 (code B ref 38407); Thu, 28 Nov 2019 00:31:02 +0000 Original-Received: (at 38407) by debbugs.gnu.org; 28 Nov 2019 00:30:17 +0000 Original-Received: from localhost ([127.0.0.1]:56434 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ia7hJ-0005gI-79 for submit@debbugs.gnu.org; Wed, 27 Nov 2019 19:30:17 -0500 Original-Received: from smtp-4.orcon.net.nz ([60.234.4.59]:60203) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ia7hH-0005g8-B2 for 38407@debbugs.gnu.org; Wed, 27 Nov 2019 19:30:16 -0500 Original-Received: from [10.253.37.70] (port=43097 helo=webmail.orcon.net.nz) by smtp-4.orcon.net.nz with esmtpa (Exim 4.90_1) (envelope-from ) id 1ia7hE-00037h-42; Thu, 28 Nov 2019 13:30:12 +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 13:30:12 +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:172574 Archived-At: On 2019-11-28 10:52, Pieter van Oostrum wrote: > I used a 100KB json file from my Firefox profile > (but loaded as a text file) I missed that bit, so I should add that global-so-long-mode doesn't care about text-mode by default. It mostly targets programming modes (.json filenames included), but you can customize so-long-target-modes to include text-mode if you think you're likely to encounter such files in text-mode in practice. However I wouldn't expect a 100K file in text-mode to cause anything remotely like the degree of performance issue you've encountered. I have a 256K single-line .txt file which suffers perceivable slow-downs at the end of the file (in text-mode with visual-line-mode enabled), but nothing remotely so catastrophic as you're reporting. On my machine, I'd estimate less than a half-second delay when scrolling, so the difference is several orders of magnitude. Are you seeing that starting from "emacs -Q" ? -Phil