[Bug 273402] JPG2000 image makes kio_thumbnail hog the CPU forever

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=273402


Christoph Feck <christoph at maxiom.de> changed:

           What    |Removed                     |Added
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         AssignedTo|unassigned-bugs at kde.org     |christoph at maxiom.de




--- Comment #1 from Christoph Feck <christoph maxiom de>  2011-05-16 12:01:04 ---
KDE uses JasPer library to load JPEG 2000 image, so you should report the
problem to JasPer developers at http://en.wikipedia.org/wiki/JasPer

This library is very slow to begin with. A similar (but incompatible) PGF
format can be loaded about 10 times faster, according to its designers, see
http://www.libpgf.org/

There is, however, possible room for optimization in the thumbnail loader. It
could load a smaller resolution, instead of the full image, similar to what the
JPEG loader does.

I have yet to investigate if we need a special JPEG 2000 thumbnailer, or if
changes in kimgio loader are sufficient.

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