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From: jg@crl.dec.com (Jim Gettys)
Newsgroups: comp.unix.ultrix
Subject: Re: Hardware lines available on DECstation 3100 ?
Message-ID: <1990Nov7.142155.29124@crl.dec.com>
Date: 7 Nov 90 14:21:55 GMT
References: <BM.90Nov7182643@lion.sumikin.co.jp>
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Reply-To: jg@crl.dec.com (Jim Gettys)
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This is not quite the data you were asking for.

In any case, measured using X11perf (i.e. user level code talking to
a real X server), a ROUND TRIP (message from x11perf, processing of 
it in the X server, and a response) is 2 milliseconds
on machine using Unix domain IPC, 3 milliseconds using TCP, with Ultrix 4.0 
on a DECstation 3100, and across the network with TCP, it is 3.6 milliseconds for 
the ROUND TRIP.  This includes the process scheduling, and everything, for
a complete round trip.  One could probably do marginally better than this,
and whether the measurement methodology is what you'd like is another question
as well.
				- Jim