Bug 432929 - Scrolling in QML apps is slow and makes an entire cpu core to be used
Summary: Scrolling in QML apps is slow and makes an entire cpu core to be used
Status: RESOLVED FIXED
Alias: None
Product: frameworks-kirigami
Classification: Frameworks and Libraries
Component: general (other bugs)
Version First Reported In: unspecified
Platform: Neon Linux
: NOR normal
Target Milestone: Not decided
Assignee: Marco Martin
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-02-14 11:28 UTC by Patrick Silva
Modified: 2021-02-17 17:45 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Patrick Silva 2021-02-14 11:28:59 UTC 
SUMMARY
For example, when I scroll the playlist in Elisa player, the list of services in
Background Services KCM and the list of effects in Desktop Effects KCM, scrolling is slow and an entire cpu core is used.

EXPECTED RESULT
good performance and low cpu usage

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.21.80
KDE Frameworks Version: 5.80.0
Qt Version: 5.15.2
Kernel Version: 5.8.0-43-generic (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i3-3110M CPU @ 2.40GHz
Memory: 7,7 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4000
Comment 1 David Redondo 2021-02-15 09:32:23 UTC 
Can confirm the background services kcm lags horribly. Another instance is the list of applications in the notifications kcm
Comment 2 Nate Graham 2021-02-16 19:44:59 UTC 
Perhaps an issue with the qqc2 desktop style?
Comment 3 David Redondo 2021-02-17 07:46:19 UTC 
Arjen pushed some changes to fix this https://invent.kde.org/frameworks/kirigami/-/commit/40e1743fcd17eac305a40d6df1aecc1bf4489cb2 and related qqc2 desktop style change
Comment 4 Patrick Silva 2021-02-17 17:45:16 UTC 
It's fixed on neon unstable. :)
Thank you all.