[frameworks-kio] [Bug 434175] Move to wastebin functionality is so slow that is unusable when it already has a lot of stuff in it

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=434175

--- Comment #6 from tagwerk19 at innerjoin.org ---
Comparing the performance of Neon Testing, Neon Testing with LUKS and openSuse
with BTRFS, there's not a lot of difference. Strangely, the "straight" Neon
Testing was a little slower than the other two. But this is a "bowl of fruit"
comparison - not pretending to compare apples with apples...

I created 100000 files each containing "Hello World", selected them in Dolphin
and said "Move to Trash". The process started fast (moving 1000 per minute) but
slowed by a factor of 10 to about 100 per minute. It was still going many hours
later...

With htop:

*   The bottleneck seems to be trash.so, that was sitting solidly at
    99 to 100% CPU
*   baloo_file varied 3% to 50% CPU. It's obviously having to run to keep up.
*   With LUKS, there were several kworker 'kcryptd' processes so that
    work was being spread across several cores.

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