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Re: An optimisation question [message #79710 is a reply to message #79709]

Tue, 27 March 2012 15:00

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Matt Francis writes:

>> values = (REFORM(basis[index,*,*]))[ilat,ilon]
>
> In this case the RHS returns an array of the correct length, however
> for the size of basis array I have, the second version turns out to be
> literally hundreds of times slower (according to PROFILER). I though
> this must be because of REFORM, but the time spent in the REFORM
> function is relatively small. I can't work out why the second version
> is slow?

I suspect it is those pesky asterisks giving you trouble
in your loop.

http://www.idlcoyote.com/code_tips/asterisk.html
http://www.idlcoyote.com/misc_tips/submemory.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: An optimisation question By: Matt Francis on Tue, 27 March 2012 15:54
		Re: An optimisation question By: Matt Francis on Tue, 27 March 2012 15:45
		Re: An optimisation question By: David Fanning on Tue, 27 March 2012 15:00
		Re: An optimisation question By: Matt Francis on Tue, 27 March 2012 14:26
		Re: An optimisation question By: Yngvar Larsen on Tue, 27 March 2012 02:35

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