https://bugs.kde.org/show_bug.cgi?id=474780

            Bug ID: 474780
           Summary: Window switching is slow
    Classification: Plasma
           Product: kwin
           Version: 5.27.8
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: tabbox
          Assignee: kwin-bugs-n...@kde.org
          Reporter: qui...@gmail.com
  Target Milestone: ---

SUMMARY
***
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***
I just installed KDE to try it out.  Most things seem to respond quickly.  But
when I use Alt-Tab to switch windows, it is quite slow.

It takes about 2 seconds to either switch immediately to a new window, or about
2 seconds to bring up the window list.  
When I bring up the list, the delay is in displaying the list.  Once I choose a
new window and release the keys, the new window is selected quickly.

I'm using the compact switcher, but I'm seeing the delay with different
switchers too.




STEPS TO REPRODUCE
1. Press Alt-Tab
2. Wait about 2 seconds for the new window to be selected, or window list to be
displayed
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Graphics Platform: X11
Fedora 38 x86_64


ADDITIONAL INFORMATION

Operating System: Fedora Linux 38
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Kernel Version: 6.4.15-200.fc38.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-7700 CPU @ 3.60GHz
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1050/PCIe/SSE2
Manufacturer: LENOVO
Product Name: 10MNS38000
System Version: ThinkCentre M910t

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