Here is more concrete context. Platform / tools Target: macOS app Language / frameworks: Swift, SwiftUI, SwiftData Cloud sync: SwiftData with CloudKit mirroring in the production configuration Xcode: 26.4 (17E192) Test OS: macOS 26.4 (25E246) What I’m seeing In the macOS app, issue board scrolling can become inconsistent or very slow. Changing an issue status from detail view can be very slow. Scrolling the status menu itself can be slow. Typing in issue description/notes fields can become sluggish. The problem is much more noticeable with my full production-sized dataset than with a small dev dataset. What I’ve tested so far I compared a small dev dataset vs a much larger production-sized dataset. With a small dataset, the same UI feels fast and smooth. With the large dataset, the same UI becomes noticeably slower. I also tested a local-only copy of the production dataset with CloudKit disabled. That improved some behavior, but it did not remove the lag entirely. When I reduced the local te
Topic:
App & System Services
SubTopic:
iCloud & Data
Tags: