Re: [quicwg/base-drafts] Orphan Placeholder (#2690)

Robin Marx <> Thu, 16 May 2019 14:02 UTC

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From: Robin Marx <>
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Subject: Re: [quicwg/base-drafts] Orphan Placeholder (#2690)
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rmarx commented on this pull request.

> +cannot be reprioritized.  The structure of the dependency tree changes as
+PRIORITY frames modify the dependency links between other prioritized elements.
+All dependent streams are allocated an integer weight between 0 and 255
+Streams with the same parent SHOULD be allocated resources proportionally based
+on their weight.  Thus, if stream B depends on stream A with weight 4, stream C
+depends on stream A with weight 12, and no progress can be made on stream A,
+stream B ideally receives one-third of the resources allocated to stream C.
+A weight of zero indicates that no resources should be allocated to the
+indicated stream if progress can be made on other streams dependent on the same
+A reference to an element which is no longer in the tree is treated as a

This is the main crux and why I proposed adding the orphan placeholder in the first place. Imo, it makes more sense for stream 100 to get no bandwidth, than to make it part of the root and thus make it one of the most important resources in the tree (even if it just has a weight of 16). 

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