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Cloudflare ships Vary header support in Cache Rules
Technical problem surfaces: Vary creates cache explosion
2 Sep 22 11:13 AM · 1d ago · 1 post · 1 source · development 2 of 3
Cloudflare's blog post explains Vary's core flaw: the header tells caches which request fields may affect a response but not which differences actually matter. Without smart handling, similar requests can spread into thousands of barely-reusable cache entries, while ignoring Vary risks serving wrong content entirely.
“Vary tells a cache which request fields may affect the response, but it does not tell the cache which differences actually matter.”
CloudflareCloudflare CDN providerAlex Krivit Cloudflare authorZaidoon Abd Al Hadi Cloudflare author
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1Cloudflare announces Vary header support…2Technical problem surfaces: Vary creates…3Story gains traction on Hacker News
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