The Ultimate Guide to React Native Performance

React Native is an incredibly powerful framework, but achieving true native performance requires a deep understanding of the bridge and JavaScript thread. Let's dive into the techniques used by top-tier apps to maintain 60 FPS.

Understanding the Bridge

The bridge is the communication layer between the JavaScript thread and the native UI thread. When you pass large amounts of data across this bridge, you cause frame drops.

Using FlatList Correctly

Never use ScrollView for large lists. FlatList renders items lazily, saving memory and CPU cycles. Always use `keyExtractor` and `getItemLayout` for maximum performance.