bug#4108: 23.1; MS Windows (tested on Vista and XP) scrolling stutters/pauses

bug#4108: 23.1; MS Windows (tested on Vista and XP) scrolling stutters/pauses

[Reto Hubmann]

Scrolling problems get worse with complicated sources. Try
color-theme-library.el.  It is already happening with the default font
(Courier New). But selecting fixedsys font for example is making it
far worse. It happens when scrolling down with C-n. I hope tis can be
fixed because it keeps me from using 23 and I stick with 22 as the
problem does not exist there. It may have something to do with the new
font engine, I don't really know though...


In GNU Emacs 23.1.1 (i386-mingw-nt6.0.6001)
 of 2009-07-30 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 6.0.6001
configured using `configure --with-gcc (4.4)'

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: DES
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n <help-echo> C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <menu-bar> <options> <menu-set-font> C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n <apps> x <backspace> M-x b u g - r 
e p <tab> <backspace> <backspace> <backspace> <tab> 
<tab> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
r e p <tab> o r <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
dired-show-file-type: Searching for program: no such file or directory, file
Making completion list... [2 times]
kill-region: The mark is not set now, so there is no region [2 times]

bug#1611: bug#4108: 23.1; MS Windows (tested on Vista and XP) scrolling stutters/pauses

[Lars Ingebrigtsen]

Reto Hubmann <retohu@gmail.com> writes:

> Scrolling problems get worse with complicated sources. Try
> color-theme-library.el.  It is already happening with the default font
> (Courier New). But selecting fixedsys font for example is making it
> far worse. It happens when scrolling down with C-n. I hope tis can be
> fixed because it keeps me from using 23 and I stick with 22 as the
> problem does not exist there. It may have something to do with the new
> font engine, I don't really know though...

(I'm going through old bug reports that unfortunately didn't get any
response at the time.)

I don't think I've heard about any slow-scrolling issues on Windows for
quite some time (this bug report is ten years old).

Are you still seeing these problems?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#4108: bug#1611: bug#4108: 23.1; MS Windows (tested on Vista and XP) scrolling stutters/pauses

[Lars Ingebrigtsen]

The mail bounced, so I'm closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#1611: bug#4108: 23.1; MS Windows (tested on Vista and XP) scrolling stutters/pauses

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 30 Sep 2019 09:25:40 +0200
> Cc: 4108@debbugs.gnu.org, 1611@debbugs.gnu.org
> 
> Reto Hubmann <retohu@gmail.com> writes:
> 
> > Scrolling problems get worse with complicated sources. Try
> > color-theme-library.el.  It is already happening with the default font
> > (Courier New). But selecting fixedsys font for example is making it
> > far worse. It happens when scrolling down with C-n. I hope tis can be
> > fixed because it keeps me from using 23 and I stick with 22 as the
> > problem does not exist there. It may have something to do with the new
> > font engine, I don't really know though...
> 
> (I'm going through old bug reports that unfortunately didn't get any
> response at the time.)
> 
> I don't think I've heard about any slow-scrolling issues on Windows for
> quite some time (this bug report is ten years old).

At least bug#1611 compares Emacs from before the introduction of
line-move-visual and after it.  That variable is non-nil by default,
and movement by visual lines is definitely slower than moving by
physical lines.  It's still reasonably fast IME, but if people want
the pre-Emacs-23.1 behavior, they can customize line-move-visual to
nil.