[1996]

You are from Cloudflare? Could you tell me why the replies to geoip/latency based routing CNAMEs do not seem to be cached by Cloudflare?

The setup is: domain.com -> geoiplbr.domain.com with cloudflare caching enabled. Nothing else that is fancy and could cause delays.

If I measure the TTFB for domain.com, I see a large DNS delay until about the 4th consecutive query - and then the DNS is no longer the limiting factor.

The same measures on geoiplbr.domain.com normalize after the 2nd query.

It seems to me you have some kind of Roud Robin going on that does not share the DNS results.

Or maybe the caching is not done at the POP level?

[kentonv]

Sorry, I work on Workers, not DNS, so I honestly don't know.