← Next.js learning pathNext.js · Module 9 of 10
Performance and best practices
Make Next.js apps fast and maintainable.
📖 Key ideas
- Keep client components small; prefer server rendering.
- Use dynamic import for heavy components.
- Cache data and use static rendering where possible.
- Measure with Lighthouse and Core Web Vitals.
- Use TypeScript and ESLint from create-next-app.
💡 Real-life example: Performance work is packing light: only carry (ship) what the user really needs.
dynamic()Lazy-loads a component
Core Web VitalsLCP, INP and CLS metrics
LighthousePerformance audit tool
Bundle analyzerShows what fills your JS bundle