Re: [quicwg/base-drafts] RTTVar is not really a variance (#3223)

Martin Thomson <> Tue, 10 December 2019 23:48 UTC

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From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] RTTVar is not really a variance (#3223)
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martinthomson commented on this pull request.

> @@ -251,8 +251,8 @@ RTT samples and peer-reported host delays (see Section 13.2 of
 {{QUIC-TRANSPORT}}) to generate a statistical description of the connection's
 RTT. An endpoint computes the following three values: the minimum value
 observed over the lifetime of the connection (min_rtt), an
-exponentially-weighted moving average (smoothed_rtt), and the variance in the
-observed RTT samples (rttvar).
+exponentially-weighted moving average (smoothed_rtt), and the mean deviation

I would say "variation (or mean deviation)"

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