@juraj , no offence, you're completely wrong. I am running 15.2 beta 3 on my system as well, and contrary to what the release notes say (which I what I presume was the basis of your reply), the issue is clearly still present simply scrolling through Settings, Tips and any other SwiftUI scrollview.
schm1dt
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
To add to this, the recently released build of macOS 15.2 Beta 2 (24C5073e) doesn't seem to be the one to fix it despite what Apple states in the release notes (which claim it is fixed). From a brief test SwiftUI scrollviews still seem to stutter and lag as in previous builds.