react-native-best-practices

To fix React Native jank and frame drops, profile JS and native threads to identify bottlenecks, optimize lists with FlashList, and resolve JS thread blocking. This provides exact steps to diagnose and repair scrolling performance issues.

The best way to reduce React Native bundle size is analyzing the JavaScript bundle to identify large dependencies and applying tree shaking. This diagnostic approach isolates heavy libraries for removal or replacement to shrink the output.

Profiling for React Native optimization works by measuring FPS, TTI, and memory leaks across JS and native code. It uses specialized debugging tools to analyze thread execution and bridge overhead, pinpointing exact functions causing slowdowns.

Yes, you can use FlashList to optimize list rendering in React Native. It replaces standard lists to reduce re-renders and improve scrolling performance, directly addressing frame drops and jank during heavy list interactions.

React Native slow startup time is caused by large bundle sizes, bridge overhead, and unoptimized Hermes execution. Profiling TTI and analyzing bundle dependencies identifies the specific heavy modules delaying the initial load.

You should optimize Hermes and native modules when profiling reveals JS thread blocking or excessive bridge overhead. Addressing these specific native code bottlenecks reduces memory leaks and stabilizes animations during complex app interactions.