Date: Fri, 14 Feb 2020 07:32:35 -0800
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Subject: Re: [quicwg/base-drafts] Is ACK delay zero for Initial and Handshake
 ACK frames? (#3459)
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The intent is to use 0 as a peer max_ack_delay for the Initial and Handshake packet number spaces.

The pseudocode says:
 ack_delay = min(Ack Delay in ACK Frame, max_ack_delay)

So for Initial and Handshake, min(Ack Delay, 0) = 0 

The text in the "Estimating smoothed RTT and RTTVar" section is fairly clear I think?
"- MUST ignore the Ack Delay field of the ACK frame for packets sent in the
   Initial and Handshake packet number space."

I fixed the section reference in #3460 



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<p>The intent is to use 0 as a peer max_ack_delay for the Initial and Handshake packet number spaces.</p>
<p>The pseudocode says:<br>
ack_delay = min(Ack Delay in ACK Frame, max_ack_delay)</p>
<p>So for Initial and Handshake, min(Ack Delay, 0) = 0</p>
<p>The text in the "Estimating smoothed RTT and RTTVar" section is fairly clear I think?<br>
"- MUST ignore the Ack Delay field of the ACK frame for packets sent in the<br>
Initial and Handshake packet number space."</p>
<p>I fixed the section reference in <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="565395430" data-permission-text="Issue title is private" data-url="https://github.com/quicwg/base-drafts/issues/3460" data-hovercard-type="pull_request" data-hovercard-url="/quicwg/base-drafts/pull/3460/hovercard" href="https://github.com/quicwg/base-drafts/pull/3460">#3460</a></p>

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