Optimizing React Performance: Tips and Tricks

Make React Blazing Fast

Slow React app? These optimization techniques will help you achieve better performance.

Key Techniques

1. React.memo

Prevent unnecessary re-renders:

const ExpensiveComponent = React.memo(({ data }) => {
  return <div>{data}</div>;
});

2. useMemo & useCallback

Memoize expensive computations:

const memoizedValue = useMemo(() => computeExpensive(a, b), [a, b]);
const memoizedCallback = useCallback(() => doSomething(a), [a]);

3. Code Splitting

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

4. Virtual Lists

Use react-window for long lists.

Profiling Tools

• React DevTools Profiler
• Chrome Performance Tab
• Lighthouse

Results

Apply these and see 50-70% performance improvement!