Re: 23.0.60; Slowdown in directory scanning over time.

["Lennart Borgman (gmail)" <lennart.borgman@gmail.com>]

JDEE and the things it depends on are not yet a part of Emacs, 
unfortunately. I don't know exactly where this message should go, but I 
guess that cedet-devel and jdee-devel both might be good places so I 
have CC:ed them.


Len Trigg wrote:
> [Resending this, because I'm not sure if my email made it through the
> first time]
> 
> 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 emacs-pretest-bug@gnu.org mailing list.
> 
> Please describe exactly what actions triggered the bug
> and the precise symptoms of the bug:
> 
> I'm using CVS emacs and I've noticed that it's exhibiting a very
> painful slowdown over time.  I'm primarily using JDEE for Java
> development, and when opening a new java file it can get to taking
> minutes for the file to open.  If I restart emacs things are snappy
> again.  I have tried to narrow things down and think I have found the
> problem.  When opening a java file, JDEE does a scan of library
> directories to build the project classpath, and it seems to be this
> scanning that is taking longer to evaluate.  When switching to an
> already open Java buffer, it does a quick scan looking in various
> directories for changes to the project file, and this also slows down.
> 
> If I evaluate the following code:
> 
>   (let ((time-initial (current-time))
>         (files (directory-files "/home2/len/reeltwo_sandboxes/vetech/src/com/vetech/datamodel")))
>     (message (format "Took %d seconds to list %d files" (time-to-seconds (time-subtract (current-time) time-initial)) (length files))))
> 
> with the emacs I just had running (which had been open for several
> days, but only had approximately 35 buffers open), the output said it
> took between 2 and 3 seconds to list 166 files.  With this freshly
> restarted emacs, it now repeatedly says 0 seconds.  I hope you can pin
> things down to find the actual cause.
> 
> 
> Cheers,
> Len.
> 
> 
> 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'.
> If you would like to further debug the crash, please read the file
> /home2/len/local/share/emacs/23.0.60/etc/DEBUG for instructions.
> 
> 
> In GNU Emacs 23.0.60.2 (i686-pc-linux-gnu, GTK+ Version 2.10.4)
>  of 2008-03-25 on noir
> configured using `configure  '--with-x-toolkit=gtk' '--prefix=/home2/len/local''
> 
> 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: en_NZ
>   value of $XMODIFIERS: @im=none
>   locale-coding-system: iso-latin-1-unix
>   default-enable-multibyte-characters: t
> 
> Major mode: Emacs-Lisp
> 
> Minor modes in effect:
>   shell-dirtrack-mode: t
>   pmwiki-minor-mode: t
>   erc-autoaway-mode: t
>   erc-button-mode: t
>   erc-ring-mode: t
>   erc-track-mode: t
>   erc-fill-mode: t
>   erc-stamp-mode: t
>   erc-pcomplete-mode: t
>   display-time-mode: t
>   delete-selection-mode: t
>   show-paren-mode: t
>   pc-selection-mode: t
>   tool-bar-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   global-auto-composition-mode: t
>   auto-composition-mode: t
>   auto-compression-mode: t
>   column-number-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
> 
> Recent input:
> ESC x r i c DEL DEL DEL i r c RET j e TAB r TAB DEL 
> DEL TAB h t t p : / / w w w . j w z . o r g / d o c 
> / t a b s - v s - s p a c e s . h t m l RET k u r TAB 
> h t t p : / / w w w . j w z . o r g / d o c / t a b 
> s - v s - s p a c e s . h t m l RET C-x C-f ~ / t e 
> TAB . e l TAB RET C-n C-n C-n C-n C-b C-x C-e C-w C-x 
> C-e C-x C-e C-x C-e C-x C-e C-n ESC x r e p o r TAB 
> b u TAB RET
> 
> Recent messages:
> Took 0 seconds to list 166 files
> "Took 0 seconds to list 166 files"
> kill-region: The mark is not set now, so there is no region
> Took 0 seconds to list 166 files
> "Took 0 seconds to list 166 files"
> Took 0 seconds to list 166 files
> "Took 0 seconds to list 166 files"
> Took 0 seconds to list 166 files
> "Took 0 seconds to list 166 files"
> Took 0 seconds to list 166 files
> "Took 0 seconds to list 166 files"
> 
> 
>