CDN and Edge Caching Checklist for Indian Websites
A CDN caches your static content at edge locations closer to visitors, cutting load times for users far from your origin server. But turned on carelessly, it can also serve stale prices or logged-in content to the wrong users. Here's a practical checklist.
What to cache at the edge
- Images, CSS, JS, fonts — safe to cache aggressively, version filenames on change
- Fully static HTML pages (blog posts, docs) that don't vary per visitor
- Public API responses that are identical for all users (e.g. a product catalog)
What NOT to cache blindly
- Logged-in dashboards, cart pages or account pages — cache by cookie/session and you'll leak one user's data to another
- Real-time pricing/stock pages during a flash sale, unless your cache TTL is seconds, not hours
- WooCommerce checkout and cart pages — these must stay dynamic per session
Purging on deploy
Whenever you push a design or content change, purge the CDN cache for affected URLs — or better, use versioned asset filenames so old cached copies simply stop being requested instead of needing a manual purge.
Quick Summary
- 1 Cache static assets and public static pages aggressively
- 2 Never cache logged-in or checkout pages by default
- 3 Use versioned filenames so deploys don't need manual purges
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