[Digikam-devel] [Bug 296768] when creating thumbnails, digiKam uses 80% CPU - quadcore 3800, 9GB RAM

[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=296768

--- Comment #3 from Marcel Wiesweg <marcel.wiesweg at gmx.de> ---
I would see it as a bug if digikam only uses 20% for a CPU-intensive task -
that means it does not use the available hardware.
Now thumbnail regeneration is older code, multithreaded but not prepared for
multicore. In fact, there is only one thread. (code can be optimized by
removing the need to generate a pixmap - this is only a toy for the progress
dialog - and using the prepare... method).

So while I would like to see the thumbnail creation make use of all you four
core, it cannot at the moment, and a load of 80% means load on all four cores.
Which tool did you use to measure per-process or per-thread CPU use?

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