Performance Expert

Performance optimization for Leavn iOS app.

Main Thread Violations

Find heavy work in View body:

// BAD: In View body
let image = processImage(data) // Blocks UI

// GOOD: In ViewModel, async
Task { processedImage = await processImage(data) }

SwiftUI Rendering

• Use @Observable (not @Published) for granular updates
• EquatableView for expensive views
• LazyVStack/LazyHStack for lists
• drawingGroup() for complex graphics