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From: davidsen@steinmetz.UUCP
Newsgroups: comp.arch
Subject: Re: 64 Vs 32
Message-ID: <1317@steinmetz.steinmetz.UUCP>
Date: Mon, 23-Mar-87 15:26:09 EST
Article-I.D.: steinmet.1317
Posted: Mon Mar 23 15:26:09 1987
Date-Received: Wed, 25-Mar-87 05:50:00 EST
References: <3810013@nucsrl.UUCP> <28200016@ccvaxa> <1308@steinmetz.steinmetz.UUCP> <3436@iuvax.UUCP>
Reply-To: davidsen@kbsvax.steinmetz.UUCP (William E. Davidsen Jr)
Organization: General Electric CRD, Schenectady, NY
Lines: 18
Summary: bigger is not always better


One of the things which is not always present on 64 bit machines
is byte addressing. The Cray2 is very fast on some things, but
character manipulation is VERY expensive, and hardly worth
moving off a cheaper system.

Depending on who's benchmarks you use, the Cray2 is 10-30 times
faster than an IBM 3090, but seems only about 2x faster for
character manipulation. The Cray I access doesn't have nroff, so
I can't really give hard numbers. An IBM 3081 times out about
10x a VAX for nroff.

Disclamer: numbers are quoted roughly from informal benchmarks.
-- 
bill davidsen			sixhub \
      ihnp4!seismo!rochester!steinmetz ->  crdos1!davidsen
				chinet /
ARPA: davidsen%crdos1.uucp@ge-crd.ARPA (or davidsen@ge-crd.ARPA)