https://bugs.kde.org/show_bug.cgi?id=493902
Bug ID: 493902
Summary: Excessive CPU utilisation and jittery UI when resizing
window
Classification: Applications
Product: plasma-systemmonitor
Version: 6.1.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: ksysguard-b...@kde.org
Reporter: stev...@runbox.com
CC: ahiems...@heimr.nl, plasma-b...@kde.org
Target Milestone: ---
SUMMARY
Resizing the window by dragging from window borders is extremely choppy, makes
UI elements flicker and jump around all over the place, and causes
plasma-systemmonitor CPU use to increase proportional to drag velocity. ~60% of
one core (as self-reported by systemmonitor) is easily achievable.
On a 10900K @ 5GHz, using this much CPU time to resize a window is completely
ridiculous.
STEPS TO REPRODUCE
1. Have eyes.
2. Resize the plasma-systemmonitor window.
3. Observe.
OBSERVED RESULT
Horrible UI performance, unacceptable CPU utilisation.
EXPECTED RESULT
plasma-systemmonitor performs as well as ksysguard, and doesn't create the very
problem "system monitor" applications are used to observe/diagnose.
SOFTWARE/OS VERSIONS
Operating System: Gentoo Linux 2.15
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
Kernel Version: 6.6.51-gentoo-dist (64-bit)
Graphics Platform: Either
ADDITIONAL INFORMATION
Other "modern" plasma applications (e.g. systemsettings) also have nasty jitter
and eat excessive CPU cycles when drag-resizing their windows (i.e. this is
probably a toolkit problem), but plasma-systemmonitor is by far the worst
offender.
This is present in both wayland and X11 sessions.
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