react-performance

To optimize React and Next.js application performance, you can implement techniques like dynamic imports, Promise.all, React.cache, and SWR to reduce bundle size, eliminate waterfalls, and improve server-side rendering.

The best way to reduce bundle size in a Next.js app is to implement dynamic imports for large components, which splits your code and loads heavy dependencies only when they are needed during the rendering lifecycle.

To eliminate data fetching waterfalls in React, use Promise.all for parallel data fetching on the server-side or client-side, and leverage React.cache or SWR to prevent sequential network requests from blocking rendering.

You should use memoization to fix React re-render issues when slow load times or janky interactions occur, applying patterns like React.cache and SWR to prevent unnecessary component re-renders and optimize JavaScript performance.

Yes, CSS content-visibility improves React rendering performance by allowing the browser to skip rendering work for off-screen elements, which directly enhances the rendering speed and overall user experience of large applications.