https://bugs.kde.org/show_bug.cgi?id=440417
Bug ID: 440417
Summary: Really high CPU usage when many files are updated
Product: dolphin
Version: 21.04.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
SUMMARY
When a folder with many files is opened within Dolphin and many files are
modified, Dolphin uses 100% of a CPU core for a very long time (forever?).
Dolphin is responding though.
The problem stops when the folder is left.
STEPS TO REPRODUCE
1. create a folder with a thousand empty files
2. open this folder with Dolphin
3. modify all the files with `touch *`
OBSERVED RESULT
Dolphin uses 100% CPU, and does not appear to stop (or maybe after a very long
time).
EXPECTED RESULT
CPU usage should rise only for a small amount of time, if at all.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS/21.11pre
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.10.48
ADDITIONAL INFORMATION
I think that when multiple modification events reach Dolphin, it process every
single events, even when they are redundant.
If that is the case, a possible fix would be to ignore such events if there is
already a modification event in the event queue.
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