How do you handle memory leaks in React Native?

Question

Accepted Answer

**Common memory leak sources:**
- Event listeners not removed
- Timers not cleared
- Subscriptions not unsubscribed
- Large images not freed

**Prevention:**
```tsx
function Component() {
  useEffect(() => {
    const subscription = EventEmitter.addListener("event", handler);
    const timer = setInterval(poll, 5000);

return () => {
      subscription.remove();
      clearInterval(timer);
    };
  }, []);
}
```

**Debugging tools:**
- React DevTools Profiler
- Xcode Instruments (Leaks)
- Android Studio Memory Profiler
- Flipper performance plugin

**Best practices:**
- Use `useEffect` cleanup functions
- Avoid holding references to unmounted components
- Use WeakMap/WeakRef when appropriate

React Native: How do you handle memory leaks in React Native?