The Performance Metrics That Matter
Core Web Vitals are important, but they're just the beginning. For complex applications, focus on:
- →Time to Interactive (TTI)
- →First Input Delay (FID)
- →Database query times
- →API response latencies
Server-Side Optimization
Database Query Optimization
The biggest performance wins often come from:
- →Proper indexing strategies
- →Query plan analysis
- →N+1 query elimination
- →Connection pooling configuration
Caching Strategies
Implement caching at every layer:
- →**Edge/CDN**: Static assets, API responses
- →**Application**: Computed values, external API calls
- →**Database**: Query result caching
Frontend Optimization
Code Splitting Done Right
Don't just split by route. Consider:
- →Feature-based splitting
- →Vendor bundle optimization
- →Dynamic imports for heavy libraries
Rendering Strategies
Choose the right rendering for each use case:
- →SSR for SEO-critical pages
- →SSG for content that rarely changes
- →CSR for highly interactive features
Measuring Impact
Every optimization should be measured:
- →Establish baselines before changes
- →Use real user monitoring (RUM)
- →A/B test performance changes when possible