Bug 469662

Summary:	Setting Air/Oxygen theme makes WindowHeap-based effects stutter and delay
Product:	[Plasma] kwin	Reporter:	Maximilian Böhm <mabo>
Component:	effects-window-management	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde, mabo, nate
Priority:	NOR
Version First Reported In:	5.27.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Maximilian Böhm 2023-05-12 12:42:27 UTC

Setting Air/Oxygen theme makes Present Windows + Desktop Grid stutter and delayed. Noticed after switching to the bundled Plasma 4 themes for fun. This was no problem prior to the rewrite of the Present Windows + Desktop Grid effects last year.
Made a monitor recording. Make sure to watch in 60 Hz and hear my clicks (with mapped special mouse buttons) when the effects don’t react. I normally drive my monitor with 144 Hz but this was also present on 60 Hz. HiDPI global scale @162,5%. X.org session.

https://youtu.be/JvRnu2zxETE 

Linux: Arch
KDE Plasma Version: Plasma 5.27.5
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9

Comment 1 David Edmundson 2025-09-23 10:26:51 UTC

We are constantly improving performance and this report is old. I am going to close it, if Plasma 6.4 is still slow please create a new ticket.