As far as I'm aware - correct me if I'm
hilariously wrong - mainframes
were (and are) less renowned for their raw number crunching power but
more for massive I/O capabilities and the ability to translate that into
a metric arseload of parallel activities (sessions, transactions, ...)
going on at the same time.
"Number crunching" is perhaps the wrong term. Perhaps just plain old
horsepower would be better.
My point is this. The KL10s only managed something like 2 MIPS, I
think. For an ECL machine running a fairly clean architecture, that is
just plain old slow.
--
Will