[Digikam-devel] [digikam] [Bug 338629] digiKam freezes on Import

[Bernd Buschinski]

https://bugs.kde.org/show_bug.cgi?id=338629

--- Comment #21 from Bernd Buschinski <b.buschinski at googlemail.com> ---
So I updated to git master and tested it.

Well, it does not completly "freeze", as the gui still repaints and I can even
scroll in the import dialog, (NOTE: the scroll is very laggy and extremly slow)
BUT it does not solve the issue, I waited for 5min and it still was busy
looking in all subdirs and no image thumbnails was displayed.

Btw I also tested a very old camera with way more images, but "no" subdirs, it
was waaaay faster, like all image thumbnails  where displayed almost instantly.
So the subdirs(lookups)&history really are the problem.

I would generally vote "yes" to the "drop thumbnail History" idea, but I maybe
sometimes later, another person will find a bug were the import(lookup) gets
stuck in a specific directory, wouldn't that make the debugging harder for him?
But this would be the only real use-case I can think of.
BTW: Only the "Listing files" parts in the History causes the problems (as I
have millions of them), I only have 126 Images, so the "getting thumbnail" part
is just a few quick Lines.

Thinking about it... 
Is the "Listing files in ..." part done async in another (multiple) thread(s)?
So can it be that try to add 2 history entries at the exact same time? (just
guessing)

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