UNIX vs. VMS speed

[glenm at mako.UUCP]

For a typical mix of shell/edit/compile jobs on an 11/780, does
anyone know how UNIX compares with VMS in terms of performance?
By performance is meant response time and throughput time.

I realize that this is an involved question, and that there are
lots of other arguments in favor of UNIX.  This is being done for
a friend whose site is stuck with VMS.

I would also like to know, if one OS is significantly better than
the other, what the reasons are.  Thanks.

				Glen McCluskey
				..tektronix!mako!glenm