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Re: How to speed up large FOR loops? [message #79804]

Tue, 10 April 2012 12:39

Saurav Dhital
Messages: 4
Registered: April 2012

Junior Member

Hi Craig, yup, that is a big problem, which I had to correct a while
back. I create a FITS structure of a fixed size at the beginning and
fill it within the FOR loop and trim it at the end.

I only concatenate arrays so as to put them into fields in the FITS
table (for e.g., x = [[x1],[x2],[x3]] and struct.field = x).

One more thing that I don't do: I don't even use the where() function
in my matching as where() searches through the entire array EVERY
single time. If you are matching large arrays, where() ends up being
the biggest bottleneck.

~Saurav

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[Message index]

		Re: How to speed up large FOR loops? By: Saurav Dhital on Tue, 10 April 2012 12:39
		Re: How to speed up large FOR loops? By: Craig Markwardt on Tue, 10 April 2012 11:21
		Re: How to speed up large FOR loops? By: Saurav Dhital on Tue, 10 April 2012 10:23
		Re: How to speed up large FOR loops? By: David Fanning on Tue, 10 April 2012 10:13
		Re: How to speed up large FOR loops? By: Fabzi on Tue, 10 April 2012 09:53
		Re: How to speed up large FOR loops? By: Saurav Dhital on Tue, 10 April 2012 09:26
		Re: How to speed up large FOR loops? By: Fabzi on Tue, 10 April 2012 09:17
		Re: How to speed up large FOR loops? By: Matt Francis on Thu, 12 April 2012 19:41
		Re: How to speed up large FOR loops? By: Saurav on Fri, 20 April 2012 09:48

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