Re:Fastly S-1
by huac on Friday April 19, 2019 @12:29PM
(#19700833)
200ms is human reaction time, you can definitely notice it; the rule of thumb is 100ms https://www.pubnub.com/blog/how-fast-is-realtime-human-perce...
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Your cite says that < 1s is "for users to feel they are interacting freely with the information". Even a 400ms round trip is well within that limit.
Most, if not all websites require more than one round trip.