Forum Discussion
Is it normal for CollectionView to lag on larger lists, or am I missing an optimizaiton ?
Yes, some lag in .NET MAUI's CollectionView with large datasets ( 500+ items) is a known issue, particularly on Android, but it can often be mitigated with additional optimizations beyond just setting CachingStrategy="RecycleElement".
Enable UI virtualization ( Default on Android) : MAUI's CollectionView on Android uses virtualization by default. Ensure you don't override it by using layout settings or customer renderers that disable virtualization.
Use CollectionView.ItemsSource as a List<T>
Use List<T> or other non-observable types if the list doesn't need to reflect real-time updates, this reduces unnecessary UI refresh triggers.
Thanks for pointing that out!
It turns out that using a
List <T>instead of a
ObservableCollectionwas the exactly the root cause of the lag I was seeing. I hadn't realized how much those unnecessary UI refreshes could slow things down.