TL;DR
- http caching cdn layers 2026
- For DevOps/full-stack engineers optimizing TTFB and egress.
Who this is for
- For DevOps/full-stack engineers optimizing TTFB and egress.
Keyword (SEO)
http caching cdn layers 2026
Decision order
- First: what can be public immutable (hashed filenames).
- Then: HTML short TTL + SWR if product allows.
- Last: API response caching only with clear idempotency.
Debug
- Compare Age / CF-Cache-Status / x-vercel-cache.
- Never treat Set-Cookie responses as public cache.
Common mistakes
- First: what can be public immutable (hashed filenames).
- Then: HTML short TTL + SWR if product allows.
FAQ
Does a CDN always speed up?
No-bad headers can serve stale errors; measure and validate paths.
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About the author
We build fast websites, web/mobile apps, AI chatbots and hosting setups — with a focus on SEO and conversion.
Recommended links
From theory to production — Branchly, our hosting stack and shipped work.