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Impressions of IDL on PowerMac vs. Sparc [message #3471]

Tue, 31 January 1995 10:33

Jeff Bloch
Messages: 4
Registered: January 1995

Junior Member

We have just started playing with IDL on a Power Mac (Quadra 650 with Power
Mac upgrade card, (6100/66 equivalent) with 40MB of memory) and comparing it
to IDL running on a Sparc LX. We have found some very interesting speed
differences. Simple large array operations are a factor of two FASTER on the
Power Mac than on the Sparc, yet transcendental function array operations
(sin, asin, tan, etc) appear to be a factor of two SLOWER on the Power Mac.
Array operations using sqrt() also appear to be faster on the Power Mac.
Operations using the convol() function are also much faster on the Power Mac.
On the other hand, running the standard IDL demo on each shows the Power Mac
running the demo ~40% slower. The Sparc LX did not page or swap during the
tests.

------------------------------------------------------------ --------------
Jeffrey Bloch Office: (505) 665-2568
Astrophysics and Radiation Measurements Group ALEXIS Soc: (505) 665-5975
Los Alamos National Laboratory FAX: (505) 665-4414
Group NIS-2, Mail Stop D436 e-mail: jbloch@lanl.gov
Los Alamos, NM 87545
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[Message index]

		Impressions of IDL on PowerMac vs. Sparc By: Jeff Bloch on Tue, 31 January 1995 10:33
		Re: Impressions of IDL on PowerMac vs. Sparc By: walsteyn on Thu, 02 February 1995 12:52
		Re: Impressions of IDL on PowerMac vs. Sparc By: gurman on Thu, 09 February 1995 11:05

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