React Native: How do you optimize React Native app startup time?

Startup optimization strategies:

1. Lazy loading:

1const HeavyScreen = React.lazy(() => import("./HeavyScreen"));

2. Bundle splitting:

• Use Metro bundler configuration
• Separate vendor bundles

3. Image optimization:

• Preload critical images
• Use WebP format
• Lazy load non-critical images

4. Native module initialization:

• Defer non-essential native modules
• Use turbo modules for lazy loading

5. Hermes optimizations:

• Enable bytecode precompilation
• Use -O optimization flags

6. Profiling:

• Use adb shell am start -W for cold start
• Profile with React DevTools
• Monitor bridge calls