[dolphin] [Bug 440417] Really high CPU usage when many files are updated

[lemaitre]

https://bugs.kde.org/show_bug.cgi?id=440417

--- Comment #7 from lemaitre <kde.account at lemaitre.re> ---
(In reply to tagwerk19 from comment #6)
> I think, if you touch a file, Dolphin and thumbnail.so recreates the
> thumbnail; it doesn't know that the content has not changed. If the
> thumbnail is recreated, Dolphin reloads it. Can be that that's loads of
> work...

I'm sure that's a lot of work, but I can stay hours with dolphin eating a full
cpu.
I was thinking maybe it is because dolphin tries to process all files whenever
a single file is updated, but it does not seem to be the case, as touching few
files does not trigger high CPU usage even for a short period of time.

I am now more thinking about an infinite loop.


(In reply to tagwerk19 from comment #6)
> It would be interesting to know if Dolphin knows it can skip looking for
> thumbnails of empty files. I assume you are not on an HDD...

The bug has nothing to do with empty files. I also have the bug with images,
but it is easier to reproduce the bug with empty files.
You assumed correctly: I have an NVME SSD.

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