On Fri, Mar 20, 2020 at 7:15 AM Ralf Weber <[email protected]> wrote:

> Moin!
>
> On 20 Mar 2020, at 14:57, Paul Hoffman wrote:
>
> > On Mar 20, 2020, at 12:42 AM, Ralf Weber <[email protected]> wrote:
>
....

something else (mostly network latency and cache behaviour), where stuff
> is up for discussion, but for the performance case I described, which
> matters to people who have to buy and operate these servers, I don’t
> see how we can get the same bang for the buck for DoT/DoH.
>

I think this is the key point: there are multiple constituencies here and
they each have a different view of performance. As you say, server
operators are very concerned with CPU on the server [0], however,
what users are principally concerned with is end-to-end performance,
which is generally not dominated by server CPU. This seems especially
true for servers which are run by entities which already have high
performance TLS (or QUIC) serving capacity.

I think it's clear that the latter is the kind of performance that this
draft
is talking about. However, as I said initially, agreeing with Rob, I think
it would probably be easier to drop this text.

-Ekr

[0] It's worth noting that CPU performance used to be a big concern for
encrypted Web traffic, but that's become a much smaller concern due
to a variety of technical improvements.
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