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Re: Rechartering HTTPbis

From: Patrick McManus <pmcmanus@mozilla.com>
Date: Thu, 26 Jan 2012 10:38:10 -0500
To: Willy Tarreau <w@1wt.eu>
Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, Amos Jeffries <squid3@treenet.co.nz>, ietf-http-wg@w3.org
Message-ID: <1327592290.2052.426.camel@ds9>
On Thu, 2012-01-26 at 11:30 +0100, Willy Tarreau wrote:
> Not everywhere. From what I observe at various places, what takes a lot
> of space in requests is :
>   - user agent : no need to compress it, just specify a new non-abusive format

I'll just say that there are an enormous number of voices that want to
influence the user-agent header. I don't believe any statement from the
HTTP-WG would have any impact other than making the relevant spec that
mandated a particular U-A either DOA or be partially implemented.
Neither is a good outcome :)

>   - cookies : the largest ones are those handling an encrypted context so you
>     won't compress them

cookies tend to repeat between transactions on a connection. So the
first encrypted cookie on a connection would not compress well (it will
compress some just because it is expressed in text), but subsequent ones
compress extremely well because of their redundancy. An HTTP/2 with a
lower connection count means more transactions per connection and
therefore greater opportunities for that optimization.
Received on Thursday, 26 January 2012 15:39:09 UTC

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