Next.js 15 Performance Optimization Strategies
Performance is critical for user experience and SEO. Here's my comprehensive guide to optimizing Next.js applications based on real-world projects.
Core Optimization Techniques
1. Image Optimization
Use Next.js Image component with priority for above-the-fold images and lazy loading for others.
2. Code Splitting
Use dynamic imports to lazy load heavy components.
3. Font Optimization
Use next/font for optimal font loading with display swap.
Advanced Techniques
Server-Side Optimization
Use generateStaticParams for dynamic routes and implement proper caching with revalidation.
Database Optimization
Use connection pooling and select only needed fields.
Results
After implementing these optimizations:
- Lighthouse score: 95+ across all metrics
- First Contentful Paint: Under 1.2s
- Largest Contentful Paint: Under 2.5s
- Bundle size: Reduced by 40%