Next.js Performance Optimization: From Good to Great

Let's dive into techniques that help take Next.js apps from fast to blazing fast.

1. Image Optimization

Use the built-in next/image component with lazy loading and proper sizes.

2. Code Splitting & Dynamic Imports

Import heavy components only when needed using dynamic().

3. Data Fetching Strategies

Choose between SSG, SSR, ISR based on data freshness vs. performance needs.

4. Content Caching & CDN

Leverage caching headers, stale-while-revalidate, and edge/CDN caching.

5. Bundle Analysis

Inspect your bundle using next-bundle-analyzer to reduce size.

6. Lighthouse Audits

Regularly measure via Lighthouse and address high-impact issues.

Conclusion

With intentional image usage, code splitting, proper data-fetching patterns and caching, you can significantly improve Next.js app performance.