bug#14307: 24.3; Extremely slow/laggy scrolling

bug#14307: 24.3; Extremely slow/laggy scrolling

[veegee]

Under normal usage, scrolling using the scrollbar causes extremely
slow/laggy scrolling on Windows 8.


In GNU Emacs 24.3.1 (i386-mingw-nt6.2.9200)
 of 2013-03-17 on MARVIN
Windowing system distributor `Microsoft Corp.', version 6.2.9200
Configured using:
 `configure --with-gcc (4.7) --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include
 -ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include
 -ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'

Important settings:
  value of $LANG: ENC
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  show-paren-mode: t
  global-hl-line-mode: t
  global-linum-mode: t
  recentf-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x r e p o r <tab> <return>

Recent messages:
Loading c:/Users/veegee/AppData/Roaming/.recentf...done
Cleaning up the recentf list...done (0 removed)
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message cl-macs gv format-spec
rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils paren hl-line linum solarized-dark-theme
color-theme-solarized solarized-definitions color-theme cl cl-lib
recentf tree-widget wid-edit easymenu color-theme-autoloads
color-theme-solarized-autoloads package time-date tooltip ediff-hook
vc-hooks lisp-float-type mwheel dos-w32 ls-lisp w32-common-fns
disp-table w32-win w32-vars tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment 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 loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
make-network-process w32 multi-tty emacs)

bug#14307: 24.3; Extremely slow/laggy scrolling

[Stefan Monnier]

> Under normal usage, scrolling using the scrollbar causes extremely
> slow/laggy scrolling on Windows 8.

I luckily don't have to use such a proprietary system, but I'm pretty
sure many other Emacs users do, yet we haven't heard many complaints
about it, so there is probably something specific to your use case.

Can you test if you see this problem already with "emacs -Q"?
If not, try to find out which part of your .emacs config triggers
the problem so we can try and reproduce it on our end.


        Stefan