Hi, Some of my users are experiencing synchronization issues when using the NSPersistentCloudKitContainer in CoreData. My app is listening to any errors that occur during the synchronization with the NSPersistentCloudKitContainer.eventChangedNotification Notification. Before I just got Cocoa-Errors 2 or 3 which indicate a bad network connection or something similar. Now I received reports with a Cocoa-Error 134419. Does anyone know what this error code means? Maybe someone from the Core Data team could have a look at this. Thanks a lot, Alexander

Starting 20th March 2025, I see an increase in bandwidth and latency for one of my CloudKit projects. I'm using NSPersistentCloudKitContainer to synchronise my data. I haven't changed any CloudKit scheme during that time but shipped an update. Since then, I reverted some changes from that update, which could have led to changes in the sync behaviour. Is anyone else seeing any issues? I would love to file a DTS and use one of my credits for that, but unfortunately, I can't because I cannot reproduce it with a demo project because I cannot travel back in time and check if it also has an increase in metrics during that time. Maybe an Apple engineer can green-light me filing a DTS request, please.

In SwiftUI, it is recommended not to store ViewBuilder closures in sub-views but instead evaluate them directly in init and store the result (example: https://www.youtube.com/watch?v=yXAQTIKR8fk). That has the advantage, as I understand it, that the closure doesn't need to be re-evaluated on every layout pass. On the other side, identity is a very important topic in SwiftUI to get the UI working properly. Now I have this generic view I'm using with a closure which is displayed in two places (HStack & VStack). Should I store the closure result and get the performance improvements, or evaluate it in place and get correct identities (if that is even an issue)? Simplified example: struct DynamicStack<Content: View>: View { @ViewBuilder var content: () -> Content var body: some View { ViewThatFits(in: .horizontal) { HStack { content() } VStack { content() } } } } vs struct DynamicStack<Content: View>: View { @ViewBuilder var content: Content var body: some View { ViewThatFits(in: .horizontal) { HStack { content } VStack { content } } } }