From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38407: 27.0.50; infinite loop with display of large file without newlines Date: Sat, 07 Dec 2019 09:56:15 +0200 Message-ID: <83muc4fu1s.fsf@gnu.org> 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> <4B1ABCA7-A69C-4251-8EBD-A11654A92642@vanoostrum.org> <83v9r2o4z9.fsf@gnu.org> <24035.27244.755074.180653@cochabamba.vanoostrum.org> <83lfrwlz2w.fsf@gnu.org> <83o8wpjsx5.fsf@gnu.org> <83zhg8hz6j.fsf@gnu.org> <83fthyizpq.fsf@gnu.org> <002bd5c4-a9c1-4bda-6005-a98a6118d94b@orcon.net.nz> <83fthxhocr.fsf@gnu.org> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="194291"; mail-complaints-to="usenet@blaine.gmane.org" Cc: rpluim@gmail.com, pieter@vanoostrum.org, 38407@debbugs.gnu.org To: Phil Sainty Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Dec 08 04:28:12 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 1idnEy-000oRO-Ni for geb-bug-gnu-emacs@m.gmane.org; Sun, 08 Dec 2019 04:28:12 +0100 Original-Received: from localhost ([::1]:55270 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1idnEx-0006Sp-Lh for geb-bug-gnu-emacs@m.gmane.org; Sat, 07 Dec 2019 22:28:11 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33776) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1idnEo-0006S8-R3 for bug-gnu-emacs@gnu.org; Sat, 07 Dec 2019 22:28:03 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1idnEn-0003Tq-R4 for bug-gnu-emacs@gnu.org; Sat, 07 Dec 2019 22:28:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:44246) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1idnEn-0003T4-MV for bug-gnu-emacs@gnu.org; Sat, 07 Dec 2019 22:28:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1idnEn-0004qf-Iz for bug-gnu-emacs@gnu.org; Sat, 07 Dec 2019 22:28:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 08 Dec 2019 03:28:01 +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=B38407.157577565918605 (code B ref 38407); Sun, 08 Dec 2019 03:28:01 +0000 Original-Received: (at 38407) by debbugs.gnu.org; 8 Dec 2019 03:27:39 +0000 Original-Received: from localhost ([127.0.0.1]:50219 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1idnEQ-0004q0-Ru for submit@debbugs.gnu.org; Sat, 07 Dec 2019 22:27:39 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:50007) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1idnEP-0004pn-21 for 38407@debbugs.gnu.org; Sat, 07 Dec 2019 22:27:37 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:59263) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1idUwz-0001BB-Jo; Sat, 07 Dec 2019 02:56:25 -0500 Original-Received: from [176.228.60.248] (port=1613 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1idUwy-00043U-9s; Sat, 07 Dec 2019 02:56:25 -0500 In-reply-to: (message from Phil Sainty on Sat, 7 Dec 2019 14:28:37 +1300) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:173014 Archived-At: > Cc: rpluim@gmail.com, pieter@vanoostrum.org, 38407@debbugs.gnu.org > From: Phil Sainty > Date: Sat, 7 Dec 2019 14:28:37 +1300 > > > In general, searching for a newline is very fast in Emacs, so if you > > use the right primitives, you should be able to scan quite a lot of > > text before the time begins affecting responsiveness. > > `so-long-detected-long-line-p' is the provided predicate, and it > relies on `forward-line' (which I've assumed is as quick as I'm going > to get for finding newlines), along with narrowing to limit the amount > of text scanned to the maximum value that we care about (i.e. the > minimum length of a too-long line). > > I've just done a bit of testing with much larger files and values, and > suspect that we could indeed make these values quite dramatically > bigger without any noticeable impact. Yes, I'd expect that. Thanks.