bug#233: closed by Jason Rumney <jasonr@gnu.org> (Slow repainting, sluggish feeling emacs)

[David <david.boon@gmail.com>]

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Hi Jason , I've built latest and and things are better, but noticeably
sluggish still.  Especially on larger files, but not significantly large.
For example, I have a file that is 218 lines long, if I hold down C-n and
count, I can count to 10 before the cursor moves anywhere, and it doesn't
actually do any moving until I release the keys.

If I do the same 'test' with an older emacs, built from CVS on 02-20-2008, I
get immediate screen scrolling and cursor movement.

 -David

On Wed, Jul 30, 2008 at 6:15 PM, Emacs bug Tracking System <
don@donarmstrong.com> wrote:

>
> This is an automatic notification regarding your bug report
> which was filed against the emacs,w32 package:
>
> #233: Slow repainting, sluggish feeling emacs
>
> It has been closed by Jason Rumney <jasonr@gnu.org>.
>
> Their explanation is attached below along with your original report.
> If this explanation is unsatisfactory and you have not received a
> better one in a separate message then please contact Jason Rumney <
> jasonr@gnu.org> by
> replying to this email.
>
>
> --
> 233: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=233
> Emacs Bug Tracking System
> Contact don@donarmstrong.com with problems
>
>
> ---------- Forwarded message ----------
> From: Jason Rumney <jasonr@gnu.org>
> To: 233-done@emacsbugs.donarmstrong.com
> Date: Wed, 30 Jul 2008 23:09:06 +0100
> Subject: Slow repainting, sluggish feeling emacs
> reassign 233 emacs,w32
> thanks
>
> It seems that the performance issues are resolved by using uniscribe's
> built in caching for glyph encoding, and avoiding explicit encoding in
> the gdi backend.
>
>
>
> ---------- Forwarded message ----------
> From: David <david.boon@gmail.com>
> To: emacs-devel@gnu.org
> Date: Mon, 12 May 2008 21:10:39 -0400
> Subject: Slow repainting, sluggish feeling emacs
> I recently re-built emacs 23 from cvs and there's a noticeable delay in
> many repainting operations. Typing is sluggish and redrawing a buffer when
> switching to it is noticeably slow.
>
> So I tried to measure the difference.  I started two versions of emacs with
> --no-init, loaded nothing, and immediately ran elp-instrument-function on
> "ibuffer".  Here are the results:
>
> emacs(GNU Emacs *MailScanner warning: numerical links are often malicious:
> * 23.0.60.1 <http://23.0.60.1> (i386-mingw-nt5.1.2600) of 2008-02-20 on
> U0103223-XPA)
> Function Name Call Count Elapsed Time Average Time
> ibuffer        1           0.0           0.0
>
>
> GNU Emacs *MailScanner warning: numerical links are often malicious:*23.0.60.1<http://23.0.60.1>(i386-mingw-nt5.1.2600) of 2008-05-12 on U0103223-XPA
> Function Name Call Count Elapsed Time Average Time
> ibuffer        1           0.032         0.032
>
> I ran elp-instrument-function again and got:
> ibuffer        1           0.047         0.047
>
> The time difference is very small, but with a loaded up emacs config the
> time becomes very noticeable.
> I built emacs on windows-xp using cygwin(-mno-cygwin however),
> ming32-make.  Both versions of the build where 'configured' the same:
>
> Here's the 'report-emacs-bug' important stuff:
>
>
> In GNU Emacs *MailScanner warning: numerical links are often malicious:*23.0.60.1<http://23.0.60.1>(i386-mingw-nt5.1.2600)
>  of 2008-05-12 on U0103223-XPA
> Windowing system distributor `Microsoft Corp.', version 5.1.2600
> configured using `configure --with-gcc (3.4) --cflags -I../../include
> -msse3 -O3'
>
> 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: ENU
>   value of $XMODIFIERS: nil
>   locale-coding-system: cp1252
>   default-enable-multibyte-characters: t
>
> Major mode: Fundamental
>
> Minor modes in effect:
>   tooltip-mode: t
>   mouse-wheel-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   blink-cursor-mode: t
>   global-auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
>
> Recent input:
> M-x M-p i <backspace> e l p 0 <backspace> - i n s t
> r <tab> f u n <tab> <return> i b u f f e r <return>
> M-x l o a d - l i <tab> <return> i b u f f e r <return>
> M-x M-p M-p <return> M-p <return> M-x i b u f f e r
> <return> q C-x b C-g C-x C-b <down> <down> <down> <down>
> <down> <down> q C-x 1 M-x i b u f f e r - <M-backspace>
> e l p - r e s u l <tab> <return> C-SPC <down> M-w q
> M-x r e p o r <tab> <return>
>
> Recent messages:
> goto-history-element: Beginning of history; no preceding item
> elp-instrument-function: ELP cannot profile autoloaded function: ibuffer
> Loading ibuffer...done
> Updating buffer list...
> Formats have changed, recompiling...done
> Mark set
> Updating buffer list...done
> Commands: m, u, t, RET, g, k, S, D, Q; q to quit; h for help
> Quit
> Mark set
>
>
>

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