Bug 441951

Summary: Adding more virtual desktops is throttled in KCM
Product: [Applications] systemsettings Reporter: Alexander Potashev <aspotashev>
Component: kcm_kwinvirtualdesktopsAssignee: KWin default assignee <kwin-bugs-null>
Status: CONFIRMED ---    
Severity: minor CC: nate, plasma-bugs-null
Priority: NOR Keywords: usability
Version First Reported In: 5.21.5   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Alexander Potashev 2021-09-03 15:16:49 UTC 
SUMMARY
Adding more virtual desktop is throttled: when clicking "+ Add" multiple times in a row with short intervals (~250ms..400ms or shorter), some clicks will be ignored (IOW the number of new desktops < the number of clicks made.)

When I tried to click the button as fast as I can, I was only able to add 4 virtual desktops per second on average.

This is annoying even when I want to add 2 more virtual desktops: I make 2 clicks at a rate of a normal double-click, and this results in only one virtual desktop being added.

STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT
Should add as many virtual desktops as the number of button clicks. There should not be noticeable latency for user actions.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.83.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Using Chrome Remote Desktop which might add some latency (presumably ~50..100 ms).