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Re: Reference set in HPACK

Martin Thomson <martin.thomson@gmail.com> Wed, 02 July 2014 18:30 UTC

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References: <20140702.143041.283993814131065692.kazu@iij.ad.jp> <8C93AEC0-BA12-48AC-A66B-E447E074FCD2@mnot.net>
Date: Wed, 02 Jul 2014 11:27:16 -0700
Message-ID: <CABkgnnXWZzk-EG2EcQs1Bve0pYyAqmk91zqrJheY4LJUB+rP4w@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Mark Nottingham <mnot@mnot.net>
Cc: "Kazu Yamamoto (山本和彦)" <kazu@iij.ad.jp>, HTTP Working Group <ietf-http-wg@w3.org>
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Subject: Re: Reference set in HPACK
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On 1 July 2014 22:44, Mark Nottingham <mnot@mnot.net> wrote:
> As I understand it, one of the purposes of the reference set is to accommodate cases where intermediaries multiplex requests from different clients -- thus having different cookies, UAs, etc. -- into one upstream connection.


It's kinda the opposite actually.  The reference set clear is for that case.

Reference set is really good for server-to-server cases where the
request header fields are basically constant inter-request.  In those
cases, the marginal cost depends on how many headers are present, but
the difference is approximately 1 byte per header.

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