Achinta Hazra | Full Stack Web Developer

Introduction

React applications can become slow and unresponsive if not properly optimized. This guide covers essential techniques to keep your React apps running smoothly.

Code Splitting

Break your application into smaller chunks that load only when needed:

const LazyComponent = React.lazy(() => import('./LazyComponent'));

function App() {
  return (
    Loading...

}>
      
    
  );
}

Memoization

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

const ExpensiveComponent = React.memo(({ data }) => {
  const expensiveValue = useMemo(() => {
    return processData(data);
  }, [data]);
  
  return {expensiveValue};
});

Bundle Optimization

Analyze and optimize your bundle size using tools like webpack-bundle-analyzer and implement tree shaking to remove unused code.

Virtual Scrolling

For large lists, implement virtual scrolling to render only visible items, significantly improving performance with large datasets.

Conclusion

Performance optimization is an ongoing process. Profile your application regularly and apply these techniques where they'll have the most impact.

Optimizing Performance in React Applications