https://bugs.kde.org/show_bug.cgi?id=451007
Bug ID: 451007
Summary: High CPU usage and laggy scrolling in Discover while
loading app page
Product: Discover
Version: unspecified
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: discover
Assignee: lei...@leinir.dk
Reporter: guimarcalsi...@gmail.com
CC: aleix...@kde.org
Target Milestone: ---
Created attachment 147219
--> https://bugs.kde.org/attachment.cgi?id=147219&action=edit
Laggy scroll even on 6 Core desktop CPU
SUMMARY
After you click on an app to show its page, scrolling in Discover feels very
laggy, scrolling at about 2 to 3 fps even on a 6 core CPU. This lasts until the
app page loads completely. This is especially obvious after the new layout
changes to the app page. Check the attached video for CPU stats.
A user will naturally click on apps and scroll to browse for new ones, so this
bug is something that will affect many people if it hits 5.25 stable,
especially on less powerful computers.
STEPS TO REPRODUCE
1. Open Discover
2. Click on Applications
3. Click on one app in the main list (depending on the number of images or info
on the app page the slowness might last longer)
4. While images and comments are loading, scroll
OBSERVED RESULT
Scrolling feels very laggy and the CPU usage is high
EXPECTED RESULT
Smooth scrolling
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.13.0-30-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × Intel® Core™ i5-9400F CPU @ 2.90GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Radeon RX 570 Series
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