bug#5833: 23.1.94; Opening files on network shares on w32 is slow

[Mathias Dahl <mathias.dahl@gmail.com>]

This bug report will be sent to the Free Software Foundation,
not to your local site managers!
Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

I did this:

emacs -Q
C-x C-f //some_server/some_share/ RET
Then, on some file in Dired, opened a file with f or RET.

This operation is much slower than the same operation done using
Notepad. For a file about 80 KB in size it takes about one second in
Notepad and 5-6 seconds in Emacs.

I have tried some tips found in old threads about this, like turning off
some vc-parameter and some parameter controlling whether extra
properties should be fetched (or something like that) for shares. No
effect though. Opening local files is blazingly fast.

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
d:/pgm/emacs/etc/DEBUG.


In GNU Emacs 23.1.94.1 (i386-mingw-nt5.1.2600)
 of 2010-03-23 on G41R2F1
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --no-opt --cflags
-Ic:/imagesupport/include'

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

Major mode: Dired by name

Minor modes in effect:
  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-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-x C-f C-y <return> <down> <down> <down> <return>
<down-mouse-1> <mouse-1> M-: C-y <return> q M-: C-y
<home> <right> <right> <right> <right> q <end> <return>
C-x k <return> <up> <up> <return> <f5> <down> <up>
<down> C-x k <return> M-x f i n d SPC f i l <tab> SPC
l i <tab> <return> 5 1 0 0 <tab> <return> C-x k <return>
<help-echo> <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <down> C C-a C-k c Ö - <backspace> <backspace>
: / m u u . t x t <return> C-x C-f <up> <return> <f5>
<down> <up> C-x k <return> C-h c f f C-x k <return>
<lwindow> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <menu-bar> <help-menu> <se
nd-emacs-bug-report>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Entering debugger...
Back to top level.
nil
Copy: 1 of 1
Copy: 1 file
f runs the command dired-find-file

Load-path shadows:
None found.

Features:
(shadow sort mail-extr message ecomplete rfc822 mml mml-sec
password-cache mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231
rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util netrc
time-date mm-util mail-prsvr gmm-utils wid-edit mailheader canlock sha1
hex-util hashcash mail-utils emacsbug dired-aux help-mode easymenu view
debug dired regexp-opt 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 mldrag 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 loaddefs button minibuffer faces cus-face files
text-properties overlay md5 base64 format env code-pages mule custom
widget hashtable-print-readable backquote make-network-process multi-tty
emacs)