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Re: FOR loops removal [message #62059 is a reply to message #61975]

Tue, 19 August 2008 13:14

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Chris writes:

> IDL for loops are slow because the part of IDL
> that interprets your file a fast but crotchety old man who can't hear
> you very well and may not even really be listening. Any time you tell
> him to do something, it takes him a while to interpret what you just
> said - much longer than other, less crotchety men. Once he figures out
> what's going on, however, he's plenty fast (especially if you tell him
> to do something that he was already designed to do, for which he has
> been well optimized). Good vectorization, then, minimizes the number
> of instructions (e.g. iterations in a loop) while maximizing the
> amount of work to do with each instruction.

I think this is a transparent attempt to characterize certain
persons on this newsgroup and I deeply resent it. :-(

Cheers,

David

P.S. Let's just say I would type a smiley face, but my
feelings have been cut too close to the bone. :-)

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

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[Message index]

		FOR loops removal By: loebasboy on Tue, 19 August 2008 05:38
		Re: FOR loops removal By: loebasboy on Thu, 21 August 2008 07:27
		Re: FOR loops removal By: Jeremy Bailin on Thu, 21 August 2008 08:40
		Re: FOR loops removal By: Jeremy Bailin on Thu, 21 August 2008 06:39
		Re: FOR loops removal By: loebasboy on Thu, 21 August 2008 00:59
		Re: FOR loops removal By: Jeremy Bailin on Wed, 20 August 2008 07:07
		Re: FOR loops removal By: loebasboy on Wed, 20 August 2008 05:36
		Re: FOR loops removal By: David Fanning on Tue, 19 August 2008 13:14
		Re: FOR loops removal By: loebasboy on Mon, 25 August 2008 01:31
		Re: FOR loops removal By: Chris[6] on Fri, 22 August 2008 11:19
		Re: FOR loops removal By: ben.bighair on Fri, 22 August 2008 03:50
		Re: FOR loops removal By: loebasboy on Fri, 22 August 2008 02:08
		Re: FOR loops removal By: Chris[6] on Thu, 21 August 2008 11:34

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