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Re: IDL as programming language? [message #2877 is a reply to message #2728]

Mon, 05 September 1994 09:43

scisoft
Messages: 5
Registered: September 1994

Junior Member

William Thompson (thompson@orpheus.gsfc.nasa.gov) wrote:
: abz@waikato.ac.nz writes:
: >Speed. Some of us Grads are running some really time consuming programs
: >(large arrays, large loops). How does IDL compare with (say) FORTRAN in
: >general, speedwise? (my impression is that it's pretty slow, but I could
: >be wrong...)
: Loops are very slow. On the other hand, you usually can do it without
: loops in IDL. If you can't, there's always CALL_EXTERNAL or LINKIMAGE.

Another alternative is the IDL and PV-Wave interface to the optimized and
parallelized math library that our company sells. Dr. Thompson is
certainly correct that A=B*C is a faster matrix multiple than the
equivalent nested loops, but CALL GEMM(A,B,C) is about three times
faster than that even on a single-CPU box. On the multi-processors,
we're unbeatable.

scisoft@well.sf.ca.us for more information, end of plug.

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[Message index]

		Re: IDL as programming language? By: olsen on Wed, 31 August 1994 08:23
		Re: IDL as programming language? By: n9140397 on Tue, 30 August 1994 16:51
		Re: IDL as programming language? By: shapiro on Mon, 29 August 1994 13:50
		Re: IDL as programming language? By: Geoff.Sobering on Mon, 29 August 1994 11:08
		Re: IDL as programming language? By: thompson on Mon, 29 August 1994 07:19
		Re: IDL as programming language? By: steinhh on Sun, 28 August 1994 04:14
		Re: IDL as programming language? By: scisoft on Mon, 05 September 1994 09:43
		Re: IDL as programming language? By: stl on Thu, 01 September 1994 00:03

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