To comment on the following update, log in, then open the issue:
http://www.openoffice.org/issues/show_bug.cgi?id=95556


User af changed the following:

                What    |Old value                 |New value
================================================================================
                  Status|NEW                       |RESOLVED
--------------------------------------------------------------------------------
              Resolution|                          |WONTFIX
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------- Additional comments from [EMAIL PROTECTED] Wed Oct 29 09:16:41 +0000 
2008 -------
The thumbnails are created in the same process and thread as, for example, slide
editing.  So if you render thumbnails ahead of time the office becomes
unresponsive.  I think that that is even more annoying, than the pauses when you
scroll through the slide sorter bar.

Rendering previews in a separate thread would be a solution to this problem, but
VCL does not allow that (well, you could use a thread, but had to lock the
global solar mutex when calling into VCL and would therefore still not have
concurrent rendering.)

Additionally the previews are stored in a cache, that in the moment has a size
of 4 GB.  With a document of 200 MB size, that probably has a fairly large
number of slides, you soon reach that limit.  The effect is that unused (i.e.
not visible) previews are reduced in resolution or removed from the cache
altogether.  In that case pre-rendering previews would only waste time.

There still is code in the slide sorter for rendering previews ahead of time:
calling GenericPageCache::InvalidateCache() at apporpriate times might do the
trick.  The drawbacks, however, always outbalanced the advantages.  Therefore it
is currently not used.



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