React Performance Optimization Techniques

Optimizing React applications is crucial for delivering smooth user experiences. Here are key techniques for 2023.

Code Splitting

Split your bundle into smaller chunks:

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

Memoization

Prevent unnecessary re-renders with React.memo:

const MemoizedComponent = React.memo(function MyComponent(props) {
  /* render using props */
});

Virtualization

For long lists, use windowing techniques:

import { FixedSizeList as List } from 'react-window';

<List height={600} itemCount={1000} itemSize={35}>
  {Row}
</List>

Concurrent Features

Leverage React 18’s concurrent rendering:

const root = createRoot(document.getElementById('root'));
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

Implementing these techniques will significantly improve your React app’s performance.