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RE: Reference set in HPACK

From: <K.Morgan@iaea.org>
Date: Wed, 2 Jul 2014 09:15:34 +0000
To: <grmocg@gmail.com>
CC: <phk@phk.freebsd.dk>, <kazu@iij.ad.jp>, <ietf-http-wg@w3.org>
Message-ID: <0356EBBE092D394F9291DA01E8D28EC20118703E14@sem002pd>
On Wednesday,02 July 2014 09:55, grmocg@gmail.com wrote:
> On Wed, Jul 2, 2014 at 12:51 AM, <K.Morgan@iaea.org> wrote:
>>> On Wednesday,02 July 2014 09:43, grmocg@gmail.com wrote:
>>> For a client which is creating a new connection, e.g. on a browser restart,
>>> it may have a great many requests to send. I often have 20 or more tabs open,
>>> for instance. In cases such as these there are a fair number of requests which
>>> will look more similar and which should be sent in the first few packets.
>>> -=R
>>
>> It doesn't matter if you have 2 tabs or 50 tabs open.  You can only look at the
>> content from 1 tab at a time.
>
> [snip]
> The requests still need to be sent, though they should be prioritized appropriately,
> and the responses to them from the server sent according to that priority.
> That prioritization is mostly orthogonal, however.
> -=R

I don't understand how the prioritization is orthogonal?  You claimed that when restarting a browser there are many requests to send which will look similar. (I agree.)  But the browser should prioritize the requests for the "open" tab first (i.e. no/little benefit from a reference set for those requests).  Of course the requests for the other tabs _might_ benefit (still theory) from a reference set*, but does it really matter what the page load time is for the N-1 tabs the user isn't interacting with?

*I think this must also assume there is a proxy, rather than the client talking directly to multiple origins?


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Received on Wednesday, 2 July 2014 09:16:17 UTC

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