Re: [quicwg/base-drafts] PRIORITY frame on control stream referencing unopened request stream (#2502)

Kazuho Oku <> Thu, 09 May 2019 23:30 UTC

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From: Kazuho Oku <>
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Subject: Re: [quicwg/base-drafts] PRIORITY frame on control stream referencing unopened request stream (#2502)
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Thank you for the answers. Your observations sound right to me.

>  If each group could be tagged as round-robin vs serialized it could eliminate the need to build a deeper tree.

That's definitely one way going forward, though I think we'd lose the ability to express certain types of trees that can be represented in HTTP/2.

> If the cost to boost priority was 1 RTT per resource but they could all be done in parallel it would be fine.

This would be the case. And the cost is incurred only when there is a packet loss. To be precise, there would be 1 RTT penalty to synchronize the prioritization tree for every loss event of a packet carrying PRIORITY frame.

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