Bug 471026

Summary: Krita regenerates layer thumbnail every time user switches between open documents. (git 21c16b5)
Product: [Applications] krita Reporter: Raghavendra kamath <raghu>
Component: Layer StackAssignee: Krita Bugs <krita-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: dimula73
Priority: NOR    
Version First Reported In: nightly build (please specify the git hash!)   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Raghavendra kamath 2023-06-14 16:06:30 UTC 
SUMMARY
In the recent nightlies when user switches between two or more document the switch has delay and other issues.
The major one is the layer thumbnails in the layer docker is regenerated every time the switch happens. This adds to a lag during the switch, the progress bar sometimes shows updating thumbnails. The user can't paint or colour pick during this slight registration time. 


STEPS TO REPRODUCE
1.  Open the test files attached here in krita
2. Switch to subwindow mode in krita settings (don't know if this has any effect)
3. Ctrl tab to switch between these two documents.

I am also providing a link to a video which shows how it behaves in my machine.
https://box.raghukamath.com/cloud/index.php/s/4z2xe3Sx5g3owfC

You can download both test files from here 
https://box.raghukamath.com/cloud/index.php/s/J3kQoF6SYfW3eLC
Comment 1 Dmitry Kazakov 2023-07-21 15:39:06 UTC 
The bug should now be fixed in master! :)