Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!zaphod.mps.ohio-state.edu!casbah.acns.nwu.edu!ucsd!nosc!crash!crash!pnet01!lkoop
From: lkoop@pnet01.cts.com (Lamonte Koop)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: ICD AdSpeed Test Results!
Message-ID: <1991May18.065603.4890@crash.cts.com>
Date: 18 May 91 06:56:03 GMT
Organization: People-Net [pnet01], El Cajon CA
Lines: 36

bmccnnll@vax1.tcd.ie writes:
>Just how many Dhrystones can the Amiga do? I have an A500 with 1Mb Chip RAM and
>2Mb Fast RAM, and AIBB2 tells me 661, AmigaBench tells me 1430, and now
>apparently AIBB3 gives 1009 on this person's A2000. What the hell is going
>on??? 

You must remember that the dhrystone benchmark is dependent upon several
factors...none the least of which is how the code was compiled, the
language used, and the optimization level.  AmigaBench was written
entirely in assembly, and optimized as such, therefore the higher number.
When I wrote AIBB v2.0, I was in some kind of funky Modula-2 kick, so
you see a lower number, as I have yet to see an M2 compiler for the Amiga
which optimizes as well as the popular C compilers.  AIBB v3.0 saw my return
to C, (SAS/C 5.10a to be exact), and thus the higher number over AIBB 2.0.
As for the code, and optimization, AIBB v3.0 is uses a version of the
dhrystone program VERY close to the popular dhrystone 2.1 floating around.
Optimization wise, the code uses register variables where possible, and
of course register function arguments.  It was not run through SAS/C's global
optimizer as AIBB was meant to compare system performance...having GO
eliminate chunks of code as 'dead' eliminates this purpose.

>If anyone has any _reliable_ figures, please let me know (e-mail is
>preferable). I'm also interested in comparing an Amiga 3000 to an Archimedes
>speed-wise...
>

I would have e-mailed this, but I've been having mail bounce all over the
net lately, an besides, perhaps someone else is interested in this as well.

>Barry.


                             LaMonte Koop
 Internet: lkoop@pnet01.cts.com         ARPA: crash!pnet01!lkoop@nosc.mil
           UUCP: {hplabs!hp-sdd ucsd nosc}!crash!pnet01!lkoop
 "It's a dog-eat-dog world...and I'm wearing Milk Bone underwear"--Norm