vercel-react-best-practices

To optimize React and Next.js performance, apply structured rules covering bundle size reduction, server-side efficiency, and re-render elimination to refactor codebases for peak efficiency and faster load times.

Slow load times and bundle size bloat in Next.js are caused by inefficient data fetching waterfalls and unoptimized rendering. Parallelizing data fetches and minimizing initial bundles improve Time to Interactive.

To eliminate data fetching waterfalls in React components, parallelize client-side data fetching and apply advanced patterns to structure requests efficiently, avoiding sequential waits that block rendering.

The best way to refactor React code for rendering performance is applying correct component memoization and re-render optimization rules to prevent unnecessary UI updates and reduce JavaScript execution overhead.

You do not need Next.js to apply all rules, as the guidelines cover core React performance like JavaScript execution and re-render optimization, but server-side performance sections specifically target Next.js environments.

Focus on server-side performance to reduce initial bundle size and improve load times, while optimizing client-side data fetching to eliminate waterfalls and re-render issues after hydration.