Re: [quicwg/base-drafts] [HTTP/3] [editorial] Remove mention of redefining setting format. (#3220)

Mike Bishop <> Mon, 11 November 2019 20:54 UTC

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Date: Mon, 11 Nov 2019 12:54:29 -0800
From: Mike Bishop <>
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Subject: Re: [quicwg/base-drafts] [HTTP/3] [editorial] Remove mention of redefining setting format. (#3220)
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No, it's not.  It's a warning that, *due* to the varint encoding, if you use the full 32-bit value space from HTTP/2, you'll get encoded into 64 bits in HTTP/3.  For example, Secondary Certs sends a four-byte binary value in its setting; keeping the identical definition in HTTP/3 would waste space.

Such extensions should either restrict themselves to 30 bits (to fit in the same size) or make use of the 62-bit space since they'll be encoded into that size anyway.

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