Caching Strategies for Web Applications

Caching dramatically improves application performance. This guide covers caching strategies at every layer of your application stack.

Caching Layers#

Browser Caching#

Cache-Control Headers#

Service Worker Caching#

CDN Caching#

Vercel Edge Config#

Cache Invalidation#

Application-Level Caching#

Redis Caching Layer#

Cache Patterns#

Cache-Aside#

Write-Through#

Write-Behind (Write-Back)#

Query-Level Caching#

Prisma with Redis#

Memoization for Expensive Computations#

Cache Invalidation Strategies#

Time-Based (TTL)#

Event-Based#

Version-Based#

Best Practices#

1. Cache at the right level: Start with CDN, then application cache
2. Set appropriate TTLs: Balance freshness with performance
3. Plan for invalidation: Know how and when to clear caches
4. Monitor hit rates: Track cache effectiveness
5. Handle cache failures: Application should work without cache

Conclusion#

Effective caching requires understanding your data access patterns. Layer your caches appropriately, implement proper invalidation, and monitor cache performance.