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Processing getting slower and slower? [message #47815]

Mon, 06 March 2006 08:52

Zoltan Bartalis
Messages: 2
Registered: March 2006

Junior Member

Hello all

[Regular reader, first time poster]

I am processing satellite data with IDL, involving reading in data,
processing it, storing it in several buffer arrays and writing (appending)
it to lots of binary files (about one million) as soon as any of the buffers
is full. Without going into more details, a more general question: has
anyone encountered that while going through several processing cycles
involving intensive file opening, writing and closing, the processing gets
slower and slower for each cycle, although the operations in each cycle are
more or less the same? I am declaring all the buffer arrays and other needed
variables _before_ looping through the read-in of the input data files, so I
would expect no change in the memory usage from cycle to cycle. Is this an
IDL issue or a platform one? Running under Windows XP.

Thanks in advance,
/Zoltan, Vienna

--
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Zoltan Bartalis Institute of Photogrammetry and Remote Sensing
Vienna University of Technology
Gusshausstrasse 27-29
A-1040 Vienna, Austria
email: zb @ ipf . tuwien . ac . at Tel (++43 1) 58801 12240
web: http://www.ipf.tuwien.ac.at/zb Fax (++43 1) 58801 12299
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[Message index]

		Processing getting slower and slower? By: Zoltan Bartalis on Mon, 06 March 2006 08:52
		Re: Processing getting slower and slower? By: Nigel Wade on Wed, 08 March 2006 06:49
		Re: Processing getting slower and slower? By: Zoltan Bartalis on Thu, 09 March 2006 08:59

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