Re: [quicwg/base-drafts] QPACK improvement: wrap absolute index values (#1644)

[Mike Bishop <[e-mail]>]

Okay, just terminology, then.  Yes, I agree you can send as much as you're able to without wrapping, and artificially expanding the index range gives you more room at the potential price of bits in part of the sequence.

It seems like the more efficient way to do that would be to:
  - Calculate `MaxEntries`
  - Figure out how many bytes are required to encode `MaxEntries`
  - Wrap at the maximum number encodable in that number of bytes

It gets a less-fixed expansion, but the expansion is always free.  `MaxEntries` as defined will already always be enough items to overflow the table, so I'm not particularly inclined to be much more aggressive than that.  However, that's a little more obtuse to specify.

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