| Re: Platform recommendation/tradeoffs? TIME_TEST [message #3952] |
Fri, 14 April 1995 00:00 |
Russ Welti
Messages: 27
Registered: October 1994
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Junior Member |
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There is an IDL routine, called TIME_TEST, which I have used to
compare IDL running on 6 different (Unix) CPUs here in my
department, and it was very convenient. I made a color plot
of the results, which showed that my machine was one of the
slowest ones, and will use that to justify a CPU upgrade to
my SPARC LX...! [ You should have seen the DEC Alpha OSF ]
It is easy to do if you already have access to one of the
machines which you are curious about.
I agree that a compounded list of many different machines
all together would be a nice reference.
P.S. Anyone running or considering running IDL on a PowerMac
should go get the free extension for speeding up floating
point operations. It made a 20% improvement in our Mac's
speed running most scientific applications. The Mac is now
faster than my SPARC on many operations. Thanks go to
Fred:
> You might get a higher speed on the PowerMac if you would install
> a new floating point math library (made by Apple). It's called MathLib.
> Ask or read about it in a comp.sys.mac.* newsgroup. (I don't know the
> details as I don't have a PowerMac. The only thing I do know is that
> the MathLib in ROM is ``slow'' when it comes to transcendental functions...
> The software patch, i.e., the MathLib extension, solves the speed problem.)
>
> Good luck,
> Fred. (walsteyn@fys.ruu.nl)
/
Russ Welti /-\
(c-g)
University of Washington \-/
Molecular Biotechnology /
PO Box 352145 /-\
Seattle, WA 98195 (a-t)
rwelti@u.washington.edu \-/
(206) 685 3840 voice (206) 685 7344 FAX /
http://chroma.mbt.washington.edu/graphics/gif/russ.gif
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