Advanced Performance Techniques in React Native

Achieving 60fps in React Native requires understanding the rendering pipeline and leveraging advanced optimization techniques.

Hermes Engine: Enable Hermes for faster startup and reduced memory usage. Use hermes: true in metro.config.js. Hermes compiles JavaScript to bytecode ahead of time.

Code Splitting: Use dynamic imports with React.lazy and Suspense. Split routes, heavy components, and third-party libraries. Monitor bundle size with @react-native-community/cli.

Lazy Loading: Load screens and components on-demand. Use InteractionManager.runAfterInteractions() to defer non-critical work until animations complete.

Profiling: Use React DevTools Profiler, Flipper Performance plugin, and Chrome DevTools. Identify expensive renders, long tasks, and memory leaks. Profile on real devices, not just simulators.

Native Modules: Offload heavy computations to native modules. Use react-native-worklets-core for animations that run on the UI thread.

Measure before optimizing. Set performance budgets and monitor metrics in production.