From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Performance degradation from long lines Date: Fri, 26 Oct 2018 12:18:52 -0400 Message-ID: References: <3717982b-8f1b-2e2b-b213-59aeb62bbb93@Alexander.Shukaev.name> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1540571982 15738 195.159.176.226 (26 Oct 2018 16:39:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 26 Oct 2018 16:39:42 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 26 18:39:38 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gG596-0003yv-Se for ged-emacs-devel@m.gmane.org; Fri, 26 Oct 2018 18:39:36 +0200 Original-Received: from localhost ([::1]:33007 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gG5BD-0005mz-Fj for ged-emacs-devel@m.gmane.org; Fri, 26 Oct 2018 12:41:47 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33182) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gG4pI-0000YZ-TE for emacs-devel@gnu.org; Fri, 26 Oct 2018 12:19:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gG4pE-0001JM-UV for emacs-devel@gnu.org; Fri, 26 Oct 2018 12:19:08 -0400 Original-Received: from [195.159.176.226] (port=37809 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gG4pE-0001Iy-Ke for emacs-devel@gnu.org; Fri, 26 Oct 2018 12:19:04 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1gG4n3-0001QX-EV for emacs-devel@gnu.org; Fri, 26 Oct 2018 18:16:49 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 31 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:e++aO7dNxRz1rRRVGYvHRDLZhGw= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:230716 Archived-At: > (let ((inhibit-field-text-motion t)) > (catch 'break > (while (not (eobp)) > (when (> (- (line-end-position 1) (point)) > global-longlines-threshold) > (throw 'break t)) > (forward-line 1))))))))) I think you can speed this up with the code below (I'd expect a speed up of about a factor 2 since (line-end-position 1) does about the same as (forward-line 1)): (catch 'break (while (unless (eobp) (or (> (+ (point) global-longlines-threshold) (progn (forward-line 1) (point))) (throw 'break t))))) > (defun inhibit-set-auto-mode-line-number-display-limit-function () > (and (integerp line-number-display-limit) > (> (buffer-size) line-number-display-limit))) > (add-hook 'inhibit-set-auto-mode-functions > #'inhibit-set-auto-mode-line-number-display-limit-function) Hmm... there seems to be a discrepancy between the identifier and the code: it seems unrelated to line-number(s). Maybe some left-over from a previous version of the code? Stefan