React Performance Optimization Guide

Performance Matters

Slow apps lose users. Here's how to keep your React applications fast.

Memoization

Use React.memo, useMemo, and useCallback strategically to prevent unnecessary re-renders.

Code Splitting

Don't load code users don't need. Use dynamic imports and React.lazy.

Virtual Lists

For long lists, render only what's visible using libraries like react-window.

Measure before optimizing. Use React DevTools Profiler to identify bottlenecks.