Video Summary and Transcription
Hello, everyone. Today I'll talk about boosting React Native app performance. We'll explore optimization techniques, practical strategies, tools, and examples. Performance is crucial for mobile apps. Slow apps lead to frustration, abandonment, and revenue loss. We need to maintain 60 frames per second and overcome performance challenges. Let's understand the React Native architecture, legacy model, and the new architecture with JSI, fabric renderer, and turbo modules. Performance issues in React Native arise due to the single-threaded nature of JavaScript. The React Native bridge can be overwhelmed by large payloads, so using JSI for direct native communication is a more efficient solution. Profiling tools like Flipper, Chrome dev tools, React dev tools, Xcode instruments, and Android profiler help identify bottlenecks. Offloading heavy computations to web workers or JSI can improve JavaScript performance. Enable Hermes engine for improved performance. Optimize flatlist usage, delay non-urgent tasks, and prevent memory leaks for better app performance. Use initial numToRender and maxToRenderPerBatch props, memoize render item, and clean up side effects for optimized rendering. Preload and cache images, delegate gesture processing to the native thread, and continuously test the app under real-world conditions for smooth rendering and fluid UI.
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