[Digikam-devel] [Bug 216894] Slow quadratic runtime generating fingerprints or thumbnails in beta6 during a big import

[Scott Crosby]

https://bugs.kde.org/show_bug.cgi?id=216894





--- Comment #2 from Scott Crosby <scrosby cs rice edu>  2009-12-01 16:49:40 ---
Yes. It progressively slows down, and the list in the dialog gets progressively
longer. Memory usage also gets progressively bigger. I suspect that the dialog
box is the cause, but I do not know.


Note, I am not doing a digikam 'import'. 

Replication instructions:

  1. Find a directory with a lot of images. (10k-50k)
  2. Make a new collection pointing to that directory [Settings -> Configure
DIgikam -> Local Collection -> 'Add Collection']
  3. In the menu, select 'rebuild fingerprints'
  4. Select 'scan'.

Observe how fast it runs, then wait about 5-10 minutes and it is much slower.
Quit and restart digikam and repeat steps 3&4, and it is again fast.

In addition, when I run digikam under oprofile, it appears that the dialog box
may be responsible for 90% of the CPU utilization.

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