React Performance Cheatsheet

React Performance Cheatsheet

Optimizing React applications is essential for providing a smooth user experience. Here are some quick tips:

1. Use React.memo: Wrap functional components to prevent unnecessary re-renders if props haven't changed.
2. useMemo and useCallback: Cache expensive calculations and function references so they don't get recreated on every render.
3. Code Splitting: Use React.lazy() and Suspense to load components only when they are needed, reducing the initial bundle size.
4. Avoid Inline Objects: Creating new objects or arrays in JSX forces child components to re-render. Define them outside or memoize them.
5. Virtualization: For long lists, use libraries like react-window to only render items currently in the viewport.