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From: mitchalsup@aol.com (MitchAlsup1)
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Subject: Re: Short Vectors Versus Long Vectors
Date: Thu, 25 Apr 2024 15:52:36 +0000
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John Levine wrote:

> According to Lawrence D'Oliveiro  <ldo@nz.invalid>:
>>On Wed, 24 Apr 2024 09:18:56 GMT, Anton Ertl wrote:
>>
>>> But the Cray-1 is not an improvement on the Model 195.
>>
>>The Cray-1 was widely regarded as the fastest computer in the world, when 
>>it came out. Cruising speed of something over 80 megaflops, hitting bursts 
>>of about 120.

> Its main practical improvement was that you could get two Crays for the price
> of one 360/195.  (Not exactly, but close enough.)

>>IBM did try to compete in the “supercomputer” field for a while longer, 
>>but I think by about ten years later, it had given up.

> IBM had tried to make computers very fast by making them very
> complicated. STRETCH was fantastically complex for something built out
> of individual transistors. The /91 and /195 had instrucion queues and
> reservation stations and loop mode. Cray went in the opposite
> direction, making a much simpler computer where each individual bit
> down to the chips and the wires, were as fast as possible.

> In many ways it was a preview of RISC.

Seymore only did fast and simple, starting before the CDC 6600.....