swiftui-debugging

SwiftUI unnecessary re-renders occur when state changes trigger excessive body evaluations; diagnose them by placing Self._printChanges() at the top of the view's body to reveal exactly what triggered the re-evaluation.

Fix choppy scrolling in SwiftUI lists by applying lazy-loading strategies, decomposing complex view hierarchies, ensuring stable view identity, and scoping state observation to prevent unnecessary body re-evaluations.

SwiftUI views lose state when their identity changes, often in lists or ForEach; using Self._printChanges() and ensuring stable identity prevents these unnecessary view re-creations and state loss.

Profile slow SwiftUI body evaluations using Instruments SwiftUI templates to trace view body re-render frequency and duration, guiding per-property observation optimizations and view decomposition strategies.

Self._printChanges() specifically detects what triggered a SwiftUI view body re-evaluation, but identifying complex performance issues requires combining it with Instruments templates and analyzing observation scope and view identity.