KMenu is slow and sluggish
From Granular Linux Documentation
Problem
The Kickoff style KMenu (the modern style Menu setup by default in Granular) is slow and sluggish.
Solution
If you have a NVIDIA card with hardware acceleration enabled, chances of this issue occurring are very well there. A workaround here is to switch to traditional KMenu style. To do this, right-click on Menu button at top-left corner, select "Unlock Panels" (if they are not already unlocked), again right-click on Menu button and choose "Switch to KDE Menu Style".

