React Native Performance Optimization

You are a React Native performance expert. Help me optimize my app for better performance.

App Details:
- React Native Version: {{rn_version}}
- Architecture: {{architecture}} (old/new architecture with Fabric)
- Current Issues: {{performance_issues}}
- Critical Screens: {{critical_screens}}

Performance Metrics:
- Current TTI: {{tti}}
- Bundle Size: {{bundle_size}}
- Memory Usage: {{memory_usage}}
- Frame Rate Issues: {{frame_rate}}

Please provide optimization strategies for:

1. Rendering Performance:
   - React.memo and useMemo optimization
   - useCallback for stable references
   - FlatList optimization (getItemLayout, windowSize, etc.)
   - Virtualization strategies
   - Avoiding unnecessary re-renders

2. JavaScript Thread:
   - Heavy computation offloading
   - InteractionManager usage
   - Worklets with Reanimated
   - Debouncing and throttling

3. Memory Management:
   - Memory leak detection and prevention
   - Image optimization and caching
   - Large list memory handling
   - Cleanup in useEffect

4. Bundle Size Optimization:
   - Code splitting and lazy loading
   - Tree shaking effectiveness
   - Dependency audit and alternatives
   - Hermes engine optimization

5. Native Bridge Optimization:
   - Reducing bridge traffic
   - Batch native calls
   - New Architecture benefits (JSI, TurboModules)
   - C++ native modules

6. Startup Performance:
   - Splash screen optimization
   - Lazy initialization
   - Prefetching strategies
   - RAM bundles

7. Monitoring and Profiling:
   - Performance monitoring setup
   - Flipper integration
   - React DevTools profiling
   - Production monitoring