Efficient state management involves: 1) Proper state structure, 2) Minimizing state updates, 3) Using appropriate state management tools, 4) Implementing proper memoization, 5) Managing state persistence efficiently.
Data virtualization involves: 1) Implementing windowing techniques, 2) Managing data chunks, 3) Implementing efficient scrolling, 4) Memory management strategies, 5) Optimizing render performance, 6) Handling large datasets.
Multi-window optimization includes: 1) Resource sharing strategies, 2) State synchronization optimization, 3) Memory management approaches, 4) Process communication efficiency, 5) UI thread management, 6) Context switching optimization.
The bridge serializes data between JavaScript and native code, which can impact performance when sending large amounts of data. Minimizing bridge traffic by batching updates and reducing unnecessary communication improves app performance.
useCallback memoizes functions to prevent unnecessary recreation between renders. It's particularly useful when passing callbacks to optimized child components that rely on reference equality to prevent unnecessary renders.
useMemo memoizes computed values to prevent expensive recalculations on every render. It's useful for optimizing performance when dealing with complex calculations or data transformations that don't need to be recomputed unless dependencies change.
Memory management includes: 1) Proper cleanup in useEffect, 2) Removing event listeners, 3) Clearing timeouts and intervals, 4) Implementing proper image caching, 5) Managing large data structures, 6) Monitoring memory leaks.
Hermes is a JavaScript engine optimized for React Native that improves start-up time, reduces memory usage, and decreases app size. It provides better performance than traditional JavaScript engines through ahead-of-time compilation and optimized bytecode.
Image optimization includes using proper image sizes, implementing lazy loading, caching images, using FastImage component for better performance, and implementing progressive loading for large images. Also consider using image compression and proper formats.
console.log statements can significantly impact performance in production by creating unnecessary bridge traffic. They should be removed or disabled in production builds using babel plugins or proper configuration.
FlatList optimization includes: 1) Using getItemLayout to avoid measurement, 2) Implementing proper key extraction, 3) Using removeClippedSubviews, 4) Optimizing renderItem with memo, 5) Adjusting windowSize and maxToRenderPerBatch, 6) Implementing proper item height calculations.
Efficient animations involve: 1) Using native driver when possible, 2) Implementing proper interpolation, 3) Using layoutAnimation for simple layouts, 4) Optimizing gesture handling, 5) Managing animation memory usage, 6) Using proper timing functions.
React.memo is a higher-order component that memoizes functional components to prevent unnecessary re-renders. It performs a shallow comparison of props and only re-renders if props have changed, improving performance by reducing render cycles for components with stable props.
FlatList is optimized for long lists by implementing windowing, which only renders items currently visible on screen. It provides better performance than ScrollView for long lists by recycling DOM elements and managing memory efficiently.
Bundle size can be reduced by removing unused dependencies, implementing code splitting, using ProGuard/R8 for Android, enabling Hermes, implementing tree shaking, and properly configuring the Metro bundler.
PureComponent implements shouldComponentUpdate with a shallow prop and state comparison, preventing unnecessary renders. It's useful for optimizing class components when you know that shallow comparison is sufficient for determining updates.
Bridge traffic can be reduced by: 1) Batching updates, 2) Minimizing state updates, 3) Using native modules for heavy computations, 4) Implementing proper data serialization, 5) Using Hermes engine, 6) Optimizing image loading and processing.
