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Re: HTTP2 Expression of Interest

From: Mike Belshe <mike@belshe.com>
Date: Tue, 17 Jul 2012 20:44:15 -0700
Message-ID: <CABaLYCt_4EQF7Jvf6h=Yg3CgqC9YQPzWVzUsUqN3koHCBAeppA@mail.gmail.com>
To: Martin J. Dürst <duerst@it.aoyama.ac.jp>
Cc: Doug Beaver <doug@fb.com>, Willy Tarreau <w@1wt.eu>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
On Tue, Jul 17, 2012 at 7:35 PM, "Martin J. Dürst"
<duerst@it.aoyama.ac.jp>wrote:

> Hello Doug, everybody,
>
>
> On 2012/07/18 7:11, Doug Beaver wrote:
>
>     * Symmetric crypto costs are not much higher; I think Akamai quoted
>> 10-20%
>>      in their response. I think the costs aren't a big deal for major
>> sites;
>>
>
> Just a quick question: I think if we could shave off 10-20% of the
> bandwidth with some new technique, we'd all go for it.
>

Symmetric crypto (RC4) is super super cheap - a couple of XORs - definitely
not 10-20% of CPU.  I'd like to see that measured again before taking
action upon it.  Obviously, if you use expensive crypto (presumably because
you want it), some algorithms take more CPU

mike


>
> So why are we okay with 10-20% more processing costs for everybody, but
> not with 10-20% more bandwidth? What's different between processing costs
> and bandwidth?
>
> Regards,   Martin.
>
>
Received on Wednesday, 18 July 2012 03:44:37 GMT

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