https://bugs.kde.org/show_bug.cgi?id=408771
Bug ID: 408771
Summary: Download a large file keeps CPU @100%
Product: frameworks-knotifications
Version: 5.59.0
Platform: Kubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kdelibs-b...@kde.org
Reporter: massimocalleg...@yahoo.it
CC: kdelibs-b...@kde.org
Target Milestone: ---
I'm a bit surprised nobody reported this yet.
It bothers me since months, but I can't really tell exactly from which
Frameworks version.
STEPS TO REPRODUCE
1. Open Google Chrome (my version is 75.0.3770.90, but any version will do)
2. go to a page where you can download a large file (e.g.
https://download.qt.io/official_releases/qt/5.12/5.12.3/)
3. download a >1GB file
4. Enjoy your CPU going at 100% just to show a green bar progressing
5. (bonus) Enjoy your laptop ventilation going crazy for the whole download
duration
OBSERVED RESULT
CPU cores going @100%
EXPECTED RESULT
A network download must not bother a CPU at all.
There is clearly a bug in the notification system (in particular the progress
bar system) where someone forgot to add a sleep call when polling the download
progress.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon
KDE Plasma Version: 5.16
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.3
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