IIRC the 7090 I programmed had a memory cycle of 2.4 usec; this was the timeThe first machine I worked on had a cycle time of one microsecond. The
later model upped the speed to a cycle time of half a microsecond. Like
(IBM 7090 & 7094, if you're wondering.)
to read or write one 36-bit word. I never used a 7094.
First machine that I actually operated had a 5 usec memory cycle for 18
bits: a DEC PDP-1.