Re: [hybi] Moving to a CONNECT-based handshake

[Jamie Lokier <[e-mail]>]

John Tamplin wrote:
> 
>    Should we consider initially supporting only port 443?> 
>    The downsides would be:
[...]
>      * some CPU overhead (though Google publications have indicated this
>        is very low)

* Memory overhead.

It's not unreasonable to consider a large WebSocket server handling on
the order of a million persistent connections.

TLS adds considerably to the minimum memory required to maintain each
socket, if those sockets are set to the minimum buffer size (to save
memory) because they are mostly idle carrying occasional tiny
messages, and used just so the server can send a notification to the
client.

TLS also seems to rule out transparent multiplexing (done by proxies)
to aggregate connections and keepalives, though there is no consensus
in favour of that anyway (and I'm not sure it _really_ rules it out).

-- Jamie