react-performance

To stop unnecessary React re-renders, wrap heavy components with React.memo and design components for stable props. You should also use useMemo and useCallback to avoid recomputing expensive calculations during render cycles.

You should apply memoization in React when dealing with expensive calculations or when passing stable props to child components. Use useMemo to cache computed values and useCallback to preserve function references between renders to prevent unnecessary re-renders.

The best way to render large lists in React without freezing is list virtualization. By integrating libraries like react-window, you can render only the visible items in a large dataset, drastically improving web application scrolling performance.

To identify React performance bottlenecks, start by measuring baseline render times. Use build-time and runtime profiling guidance to locate slow components, then apply performance budgets to track and enforce optimization limits across your web application.

Yes, you can use code-splitting to improve React performance by deferring the load of non-critical components. This reduces the initial bundle size, complementing memoization and virtualization techniques to ensure faster web application startup times.