From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Mohammed Sadik Newsgroups: gmane.emacs.bugs Subject: bug#23327: 25.0.92; show-trailing-whitespace uses too much cpu Date: Thu, 21 Apr 2016 11:33:55 +0530 Message-ID: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1461218725 11789 80.91.229.3 (21 Apr 2016 06:05:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 21 Apr 2016 06:05:25 +0000 (UTC) To: 23327@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Apr 21 08:05:14 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1at7jk-0003u3-84 for geb-bug-gnu-emacs@m.gmane.org; Thu, 21 Apr 2016 08:05:12 +0200 Original-Received: from localhost ([::1]:35021 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1at7jj-00062b-PA for geb-bug-gnu-emacs@m.gmane.org; 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Wed, 20 Apr 2016 23:03:55 -0700 (PDT) X-Gmail-Original-Message-ID: X-Authenticated_sender: sadiq@sadiqpk.org X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - md-77.webhostbox.net X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - sadiqpk.org X-Get-Message-Sender-Via: md-77.webhostbox.net: authenticated_id: sadiq@sadiqpk.org X-Authenticated-Sender: md-77.webhostbox.net: sadiq@sadiqpk.org X-Source: X-Source-Args: X-Source-Dir: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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: 208.118.235.43 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:116644 Archived-At: Enabling show-trailing-whitespace and navigating through buffer uses too much CPU. An increase of about 4-6% of CPU on my 2.4 GHz Quad-core system. How to reproduce: 1. Open a large source code file (I opened cc-engine.el from Emacs source). 2. Enable show-trailing-whitespace (setq show-trailing-whitespace t) 3. Press and hold the arrow keys to navigate. See the processor usage (use top/htop or similar program). 4. Now disable show-trailing-whitespace (setq show-trailing-whitespace nil) 5. Repeat 3 This also happens when pressing any other key (eg:while typing). Also this creates minor glitches in displaying text on buffer (sudden disappearance and appearence of some text) when CPU is already enough busy. In GNU Emacs 25.0.92.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.9) of 2016-04-20 built on fedora.localdomain Windowing system distributor 'Fedora Project', version 11.0.11800000 Configured features: XPM JPEG TIFF GIF PNG SOUND DBUS GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 Important settings: value of $LC_MONETARY: en_IN.UTF-8 value of $LC_NUMERIC: en_IN.UTF-8 value of $LC_TIME: en_IN.UTF-8 value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Emacs-Lisp Minor modes in effect: tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. t Mark set [2 times] nil Making completion list... Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message dired format-spec rfc822 mml mml-sec epg epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese charscript case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote dbusbind inotify dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 89437 9618) (symbols 48 19612 0) (miscs 40 83 185) (strings 32 14290 4341) (string-bytes 1 410796) (vectors 16 11670) (vector-slots 8 421100 7008) (floats 8 166 119) (intervals 56 962 0) (buffers 976 13) (heap 1024 35720 1005))