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Path: utzoo!utgpu!water!watmath!clyde!rutgers!ames!sdcsvax!allyn
From: allyn@sdcsvax.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: AT *speed* (was Re: 4.3 bsd for PC/AT)
Message-ID: <3895@sdcsvax.UCSD.EDU>
Date: Thu, 17-Sep-87 13:36:57 EDT
Article-I.D.: sdcsvax.3895
Posted: Thu Sep 17 13:36:57 1987
Date-Received: Sat, 19-Sep-87 07:44:41 EDT
References: <9338@brl-adm.ARPA> <3891@sdcsvax.UCSD.EDU>
Organization: U.C. San Diego
Lines: 39

In article <3891@sdcsvax.UCSD.EDU>, I posted the following benchmark:
> main()
> {
> 	float x, y;
> 
> 	for (y = 0; y < 100; y++)
> 		for (x = 0; x < 10000; x++);
> }

with the following times (in seconds user+system time, vax included for 
comparison):

> vax-11/780			20.5
> sun-3/110			52.5
> 
> and the same program with variables changed to double from float:
> vax-11/780			17.2
> sun-3/110			65.7

david@sun.com (David DiGiacomo) pointed out that i was using software 
floating point on the sun.  so i re-ran the benchmarks for the
sun using both the 68881 and the fpa.

floats:
sun-3/110			6.0	(fpa)
vax-11/780			20.5
sun-3/110			22.9	(68881)
sun-3/110			52.5	(software fp)

doubles:
sun-3/110			9.9	(fpa)
vax-11/780			17.2
sun-3/110			21.6	(68881)
sun-3/110			65.7	(software fp)

-- 
 From the virtual mind of Allyn Fratkin            allyn@sdcsvax.ucsd.edu    or
                          EMU Project              {ucbvax, decvax, ihnp4}
                          U.C. San Diego                         !sdcsvax!allyn