Re: [quicwg/base-drafts] Persistent congestion pseudocode to match text (#4010)

[Martin Thomson <[e-mail]>]

Thanks for reviewing @kazu-yamamoto.

Regarding the global sequence space, I figure that you can do this without a global sequence number in other ways.  For instance, you could track the sending time of all outstanding packets or you could enter all outstanding packets into a linked list, either of which allows you to establish a total ordering.  (In the absence of a single sequence number space, I decided not to do a total global ordering on the basis that detecting persistent congestion during the handshake was not so important.)

For the other points, the goal of this is to explain above any requirement to be performant.  You can, as I suggest in commit comments, drop pc_lost more often to limit the overhead.  It is a fair bit more complex to fit into the spec though.

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