React Performance Optimization Interview Questions

When building large-scale apps, React performance becomes critical. Many React interview questions test how well you can optimize rendering. You may be asked about React.memo, useMemo, lazy loading, or dynamic imports. Be prepared to identify common performance issues like unnecessary re-renders or large bundle sizes. Demonstrating how you profile a React app using tools like Chrome DevTools or React Developer Tools shows maturity. Discuss examples where you improved performance by refactoring components, reducing state updates, or optimizing useEffect. These are key traits hiring teams seek in senior React developers.