Optimize SwiftUI performance by:

1. Using @StateObject instead of @ObservedObject for model ownership to prevent repeated recreations ('If an observed object is recreated multiple times in a view hierarchy, you may cause unnecessary reinitialisations and data reloads'),
2. Grouping related properties into single structs rather than publishing each property individually to reduce unnecessary recomputations,
3. Following the property wrapper selection matrix: @State for local view-only state, @Binding to pass state downward, @StateObject to own observable object lifecycle, @ObservedObject for externally-owned objects, and @EnvironmentObject sparingly for global state,
4. Implementing debouncing and proper task cancellation with Swift Concurrency to prevent multiple concurrent tasks from rapid state changes,
5. Avoiding heavy synchronous calculations in body computations,
6. Splitting large views into smaller focused components
7. Using Xcode Instruments with SwiftUI templates and SwiftUI.Diagnostics environment flags for profiling and debugging recomputations