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Re: My code is way to slow.. How can I optimize!? [message #46576 is a reply to message #46573]

Mon, 28 November 2005 15:43

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

jelle.ferwerda wrote:

> Anyway. It basically is a series of nested routines, within which I
> perform regressions on subsets, and generate statistics of these
> regressions. Since about 300 lines of the code fall within these loops,
> i am not particularly sure which parts take most of the time. It
> probably is part of an array concenation part, which in a normal
> dataset is performed about 500,000 times. But it could also be the
> regression which is also performed about 500,000 times.

Before you need to know *how* to optimize, you need to know *what* to
optimize. Check out the docs on the PROFILER procedure. Use it to
determine where your program is spending time. Then start asking the
how questions.

> I am convinced that my code is sub-sub-sub optimal. Just do not know
> where to start optimizing it, as I am not a programmer, but a mere
> ecologist :-(

We'll try not to hold that against you. :) Heck, I was a wildlife
biologist once. Hummm. That probably explains a lot about my code.

-Rick

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[Message index]

		Re: My code is way to slow.. How can I optimize!? By: leatherback on Mon, 28 November 2005 16:29
		Re: My code is way to slow.. How can I optimize!? By: Mark Hadfield on Mon, 28 November 2005 15:57
		Re: My code is way to slow.. How can I optimize!? By: Rick Towler on Mon, 28 November 2005 15:43
		Re: My code is way to slow.. How can I optimize!? By: David Fanning on Mon, 28 November 2005 15:42
		Re: My code is way to slow.. How can I optimize!? By: leatherback on Mon, 28 November 2005 15:27
		Re: My code is way to slow.. How can I optimize!? By: David Fanning on Mon, 28 November 2005 15:00

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