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Yeah, that is pretty painful - how does it compare to other sites in the USA? I'd be interested in seeing a traceroute. JMAP is designed to be pretty good in that situation (we're in Australia and ~280ms away from our primary datacenter) with minimal round-trips.

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Hey, here is traceroute/mtr of a few addresses from India to USA.

https://paste.debian.net/plain/1282885 (Zoom out a bit to see it properly)

I also created a few measurements on RIPE Atlas.

Ping from all probes in India to api.fastmail.com: https://atlas.ripe.net/measurements/55469007/

Traceroute from all probes in India to api.fastmail.com: https://atlas.ripe.net/measurements/55469042/

Ooh, that's obnoxious, you're being routed the long way around the world because the closest cloudflare entry point is Singapore, by the looks of things.

It's not massively worse than what I get from here:

11. 103.168.172.63 0.0% 5 251.0 251.2 250.8 251.9 0.5

We're using cloudflare for DDoS protection and hence our packets all go into their edge where they get scrubbed before being passed to our hosts. They don't inspect the content at all, so they can't terminate early, which means every packet is round tripping that 350ms.

BUT - JMAP should still mean it's only a couple of round trips to have a fully loaded mailbox.

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