Caching is the single most impactful performance optimization for SaaS applications — it reduces latency, lowers origin load, and improves user experience. Cloudflare provides a multi-layered caching stack (CDN, Workers Cache API, KV, D1 query caching, Cache Reserve) that can serve content from edge locations within 30ms globally. This guide covers caching strategies at each layer, with practical patterns used at .
Edge Caching Strategies: From CDN to Workers Cache for Global SaaS
- ▸ The Caching Stack
- ▸ Layer 1: CDN Caching
- ↳ Default Edge Caching
- ↳ Cache-Control Headers
- ▸ Layer 2: Workers Cache API
- ↳ Usage in Server Functions
- ▸ Layer 3: Workers KV for Global Configuration
- ↳ When to Use KV vs D1 vs Cache API
- ▸ Layer 4: Stale-While-Revalidate
- ▸ Cache Invalidation
- ↳ Manual Cache Purging
- ↳ Cache Tags (Surrogate Keys)
- ▸ Cache Strategy Decision Tree
- ▸ Cache Hit Rate Optimization
- ▸ Production Caching Checklist
- ▸ Conclusion
- ↳ Related Resources
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