Tony, At 2016-03-10 11:21:59 +0000 Tony Finch <d...@dotat.at> wrote:
> Davey Song <songlinj...@gmail.com> wrote: > > > > 1) Keep-alive does reduce latency in long time queries. It is a little > > surprising to see that with keep-alive, DNS over HTTP’s latency is almost > > the same as UDP. > > That's not unexpected on a fast link, but it would be worth estimating the > difference in serialization latency on slow links. Runxia did simulate latency on the link - each of the 3 columns represents a different delay (0, 20 msec, and 200 msec). Actually, with long delay the RTT dominates and HTTP with keepalive looks most like UDP. Cheers, -- Shane
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