Performance Optimization
Image optimization with next/image, font loading with next/font, bundle analysis, code splitting, dynamic imports, and Core Web Vitals optimization.
- Difficulty
- intermediate
- Read time
- 1 min read
- Version
- v1.0.0
- Confidence
- established
- Last updated
Quick Reference
Use next/image for all images (auto WebP, srcset, lazy loading). Use next/font for Google/local fonts (self-hosted, no FOUT). Use next/dynamic for lazy loading heavy components. Import specific functions not entire libraries (lodash/debounce not lodash). Analyze bundle with @next/bundle-analyzer.
Use When
- Optimizing page load performance
- Adding images to Next.js pages
- Setting up fonts
- Reducing JavaScript bundle size
Skip When
- Simple static sites without images
- Using external image CDN with own optimization
Performance Optimization
Image optimization with next/image, font loading with next/font, bundle analysis, code splitting, dynamic imports, and Core Web Vitals optimization.