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Re: FOR loops removal [message #62106 is a reply to message #61975]

Fri, 22 August 2008 11:19

Chris[6]
Messages: 84
Registered: July 2008

Member

Are you looping 139520 times because you have that many images you are
reading from disk? If so, you probably aren't going to be able to do
any better. I/O is unavoidably slow. If not, what are you doing that
requires so my loops? How quickly do you process one image?

As a general guideline, most image processing on a single image (say a
few megapixels) should be on the order of a few seconds once
vectorized well. If you have several hundred thousand images, one
thing to consider is to merge them into larger files (by making data
cubes). This would reduce the number of hard-disk seeks during IO.

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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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