CDNs serve content from locations close to users. This guide covers configuring CDNs for optimal performance.
How CDNs Work
User (Tokyo) ─────┐
│
User (NYC) ───────┼──> Edge Server ──> Origin Server
│ (Cached)
User (London) ────┘
Cloudflare Configuration
Cache Rules
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Page Rules
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Cache Headers
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Cache Invalidation
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Cache Tags
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Performance Tips
- Use immutable for versioned assets:
max-age=31536000, immutable - Enable Brotli compression: Smaller file sizes
- Use stale-while-revalidate: Better perceived performance
- Cache API responses: Even short TTLs help
- Monitor cache hit ratio: Target >90% for static content
Configure appropriate TTLs, implement cache invalidation, and monitor cache performance.