Re: [quicwg/base-drafts] Why min CWND of 2 instead of 1 (#3586)

Marten Seemann <notifications@github.com> Mon, 20 April 2020 02:40 UTC

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Date: Sun, 19 Apr 2020 19:40:08 -0700
From: Marten Seemann <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Why min CWND of 2 instead of 1 (#3586)
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@marten-seemann commented on this pull request.



> @@ -245,6 +245,13 @@ QUIC specifies a time-based definition to ensure one or more packets are sent
 prior to a dramatic decrease in congestion window; see
 {{persistent-congestion}}.
 
+### Increase the min congestion window to 2 packets
+
+QUIC recommends a minimum congestion window of 2 packets instead of TCP's 1.
+2 packets avoid waiting for a delayed acknowledgement and allow the PTO to
+send 2 packets instead of 1, which can be particularly important during the

The PTO is not limited by the cwnd.

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