Lens Correction only uses one core

[Gilles Caulier]

I palatalized the code of DK Lensfun filter :

https://bugs.kde.org/show_bug.cgi?id=378804

It still a little dysfunction at init, but 90% of the work is done. It just
need to be finalized...

Gilles Caulier

2017-04-17 16:17 GMT+02:00 Torsten Bronger <bronger at physik.rwth-aachen.de>:

> Hallöchen!
>
> Hans-Peter writes:
>
> > i noticed that automatic lens correction (currently DK 5.5) is
> > very slow and uses only one CPU core. When doing this in Gimp
> > (lensfun-plugin), its way faster and uses all cores.
> >
> > Is this a bug or are there some reasons for this?
>
> Lensfun indeed contains no parallel execution of code.  I don't know
> for sure why this is but I suspect that the original Lensfun
> designer expected the calling program to vectorise tasks.  For
> example, different regions of the image can be corrected calling
> Lensfun concurrently.  Moreover, when mass-converting RAWs to JPEGs,
> images can be processed in parallel.
>
> Having parallel execution on both levels, Lensfun and
> Digikam/Darktable/whatever, is probably not a good idea.
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger
>
>
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