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Re: Invalid indices? [message #68390 is a reply to message #68384]

Wed, 28 October 2009 16:02

Brian Larsen
Messages: 270
Registered: June 2006

Senior Member

There are quite a few compile options out there, some I use normally
and some I don't. THis second I am worrying about execution speed
differences for compile options.

I am tempted to use strictarrsubs and strictarr in all my codes,
anyone have any thoughts on if there is a speed difference with any
compile options? I will do a test also but I'm curious of others
thoughts and experiences.

Using this simple code I see:
PRO run_test
a1 = findgen(1000)
a2 = findgen(1000)
t0 = systime(/sec)
FOR i = 0UL, 1000 DO BEGIN
s3 = a1#a2
ENDFOR
print, systime(/sec)-t0
END

no compile_opt: 7.9020839
compile_opt strictarr: 7.9031930
compile_opt strictarr, strictarrsubs: 7.8117480

So I see no slowdown, maybe even a speedup...

Cheers,

Brian

------------------------------------------------------------ --------------
Brian Larsen
Boston University
Center for Space Physics

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[Message index]

		Re: Invalid indices? By: Michael Galloy on Wed, 28 October 2009 19:55
		Re: Invalid indices? By: Brian Larsen on Wed, 28 October 2009 16:02
		Re: Invalid indices? By: Michael Galloy on Tue, 27 October 2009 11:48
		Re: Invalid indices? By: David Fanning on Tue, 27 October 2009 11:27
		Re: Invalid indices? By: Foldy Lajos on Tue, 27 October 2009 11:02
		Re: Invalid indices? By: David Fanning on Tue, 27 October 2009 11:00

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