Performance Tips Every React.JS Developer Should Know

Yadav, Niteesh
Frontend Weekly
Published in
3 min readAug 14

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As a senior JavaScript (JS) React developer, there are several performance tips and best practices you should keep in mind to ensure your React applications are efficient, responsive, and maintainable. Here are some key tips:

Component Optimization:

  • Use functional components and React Hooks whenever possible, as they offer better performance compared to class components.
  • Implement PureComponent or React.memo to prevent unnecessary re-renders when props or state haven’t changed.
  • Use shouldComponentUpdate in class components to control when a component should re-render.
  • Leverage the useMemo and useCallback hooks to memoize expensive computations and functions.

Virtualization and Pagination:

  • For long lists, use virtualization libraries like react-virtualized or react-window to render only the visible items, reducing the initial render and improving scroll performance.
  • Implement infinite scrolling or pagination to fetch and display data in smaller chunks, avoiding the loading of large datasets at once.

Optimize Rendering:

  • Utilize the Chrome DevTools and React DevTools Profiler to identify and fix rendering bottlenecks.
  • Minimize the use of inline arrow functions in render methods to avoid unnecessary re-renders.
  • Use the “key” prop effectively to help React identify items in lists and improve reconciliation.

State Management:

  • Choose an appropriate state management solution like Redux or MobX based on your application’s complexity and needs.
  • Use selectors and memoization techniques to avoid unnecessary re-computation of derived state.

Code Splitting:

  • Implement code splitting using tools like React’s built-in…

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Yadav, Niteesh
Frontend Weekly

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