bug#9588: 24.0.50; bidi-display-reordering slowing scrolling more than expected

bug#9588: 24.0.50; bidi-display-reordering slowing scrolling more than expected

[Le Wang]

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I'm filing this bug as a result from discussion on the user list.  I'm
seeing a 4-5% increase in CPU usage (from 12% to 15-18%) while scrolling
with my customized Emacs environment.  But with "emacs -q" the increased
usage is about 2% (9% to 11%).

Eli suspects something in my environment is responsible.



If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
c:/emacs/emacs_cvs_le_built/etc/DEBUG.


In GNU Emacs 24.0.50.1 (i386-mingw-nt6.1.7601)
 of 2011-09-01 on LE-ACER
Windowing system distributor `Microsoft Corp.', version 6.1.7601
configured using `configure --with-gcc (4.5)'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  rebox-mode: t
  hl-line-mode: t
  eldoc-mode: t
  which-function-mode: t
  global-auto-revert-mode: t
  nxhtml-menu-mode: t
  yas/global-mode: t
  yas/minor-mode: t
  volatile-highlights-mode: t
  autopair-mode: t
  autopair-global-mode: t
  tooltip-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
  temp-buffer-resize-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-j r e p o r t - e m <tab> <return>

Recent messages:
Loading
c:/Users/Le/cygwin_home/.emacs.d/packages/nxhtml/nxhtml/nxhtml-autoload...
nxhtml-autoload starting ... (hm, should maybe be renamed ...)
majmodpri-apply-priorities running ... (done)
Loading
c:/Users/Le/cygwin_home/.emacs.d/packages/nxhtml/nxhtml/nxhtml-autoload...done
Nxml/Nxhtml Autostart.el loaded in 0.5 seconds
Loading ~/.emacs.d/packages/nxhtml/autostart...done
Loading common_cust...done
Loading gnu_cust...done
Loading c:/Users/Le/cygwin_home/.emacs_common/dot.session.emacs...done
For information about GNU Emacs and the GNU system, type C-h C-a.

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Features:
(shadow sort gnus-util mail-extr message sendmail format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mailabbrev mail-utils gmm-utils mailheader
emacsbug le-menu rebox2 easy-mmode newcomment hl-line
le-prog-modes-common eldoc find-func rinari jump inflections findr
ruby-compilation which-func imenu pcomplete ansi-color inf-ruby compile
ruby-mode nxhtml-autostart nxhtml-autoload majmodpri vc-git autorevert
nxhtml-menu web-autoload nxhtml-base org-install highlight-symbol
hi-lock thingatpt filladapt unique-window-buffers uniquify keep-buffers
yasnippet edmacro kmacro help-mode view assoc paren mic-paren etags
volatile-highlights autopair LRU-yank auto-indent-lite byte-opt warnings
bytecomp byte-compile cconv macroexp advice help-fns advice-preload
le-color-theme color-theme easymenu wid-edit cl session cygwin-mount
ange-ftp comint regexp-opt ring time-date tooltip ediff-hook vc-hooks
lisp-float-type mwheel dos-w32 disp-table ls-lisp w32-win w32-vars
tool-bar dnd fontset image fringe lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer button faces cus-face files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
multi-tty emacs)


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bug#9588: 24.0.50; bidi-display-reordering slowing scrolling more than expected

[Eli Zaretskii]

> Date: Sat, 24 Sep 2011 08:43:50 +0800
> From: Le Wang <l26wang@gmail.com>
> 
> I'm filing this bug as a result from discussion on the user list.  I'm
> seeing a 4-5% increase in CPU usage (from 12% to 15-18%) while scrolling
> with my customized Emacs environment.  But with "emacs -q" the increased
> usage is about 2% (9% to 11%).
> 
> Eli suspects something in my environment is responsible.

This bug awaits additional information, as per

   https://lists.gnu.org/archive/html/help-gnu-emacs/2011-09/msg00218.html

bug#9588: 24.0.50; bidi-display-reordering slowing scrolling more than expected

[Glenn Morris]

Eli Zaretskii wrote:

>> Eli suspects something in my environment is responsible.
>
> This bug awaits additional information, as per
>
>    https://lists.gnu.org/archive/html/help-gnu-emacs/2011-09/msg00218.html

It never arrived, so I will close this for now.
Feel free to reopen it if you get that information.