Created attachment 177069 [details] showcase SUMMARY Resizing panel is laggy and slow. Can reproduce on 2 devices, this PC and laptop. STEPS TO REPRODUCE 1. Open panel settings 2. Set the Height or Width of panel to custom 2. Resize the panel OBSERVED RESULT Resizing panel is laggy and slow EXPECTED RESULT Resizing panel is smooth SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.2.5 KDE Frameworks Version: 6.9.0 Qt Version: 6.8.1 Kernel Version: 6.12.7-arch1-1 (64-bit) Graphics Platform: Wayland
Can reproduce on git master. It's not as laggy as it is for you in your screenshot, but I can see how there's an animation from the old size to the new one that causes a bit of lag when dragging the custom size markers.
*** This bug has been marked as a duplicate of bug 487549 ***