Re: [quicwg/base-drafts] Omit already acknowledged ACK Blocks (#2245)

[MikkelFJ <[e-mail]>]

mikkelfj commented on this pull request.



> @@ -2858,8 +2858,8 @@ discussed in more detail in {{QUIC-RECOVERY}}.
 
 To limit ACK Blocks to those that have not yet been received by the sender, the
 receiver SHOULD track which ACK frames have been acknowledged by its peer.  Once
-an ACK frame has been acknowledged, the packets it acknowledges SHOULD NOT be
-acknowledged again.
+an ACK frame has been acknowledged, an endpoint SHOULD omit all ACK Blocks that
+have not changed since the ACK frame was sent from future ACK frames.

"The receiver SHOULD track which ACK frames have been acknowledged by its
peer in order to exclude already acknowledged packets from future ACK frames
whenever these packets would unnecessarily contribute to the ACK frame size."

I mention packets and not ranges or blocks because sometimes joining two blocks can reduce the size.

I wonder if adding "have been acknowledged or presumed lost" would make any sense.

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