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Re: Speed does matter [message #91703 is a reply to message #91687]

Thu, 13 August 2015 14:19

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

On Thursday, August 13, 2015 at 1:33:24 AM UTC-6, Kallisthène wrote:
> I just ran the same tests on the official "unofficial" IDL 8.5 which promised some speed improvement. Strangely enough no such claims appeared in the "What's new" and indeed results of the above tests are strictly similar in IDL 8.5 ...
>
> The good news is that we can now switch to Python MKL inside IDL when dealing with poor performances.
>
>
> Best

Hi Kallisthène,

Well, you posts contain a lot of information. If I could sum them up, I would say "IDL is faster at some computations, Python or Matlab is faster at others."

It really does depend upon your code and your algorithm. To make a sweeping generalization, IDL's interpreter will be faster than Python's for "normal" problems - things with lots of "for" loops, small-to-medium size arrays, and image processing. Python and Matlab will be faster for hard-core linear algebra problems with large matrices.

The chances of compiling IDL against the Intel Math Kernel library is low - the IDL team isn't huge, and we have a lot of pending features on our plate.

So I think your solution is a good one. Use IDL as your general purpose scripting engine, input/output of data, use it for medium-size arrays. Then use the Python bridge to process your large arrays.

I'd love to see real-world examples of using the Python bridge, so please post again!

Cheers,
Chris
VIS/Exelis/Harris

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[Message index]

		Re: Speed does matter By: Kallisthène on Thu, 04 October 2012 06:24
		Re: Speed does matter By: Kallisthène on Thu, 13 August 2015 00:31
		Re: Speed does matter By: Kallisthène on Thu, 13 August 2015 00:33
		Re: Speed does matter By: chris_torrence@NOSPAM on Thu, 13 August 2015 14:19
		Re: Speed does matter By: Kallisthène on Fri, 14 August 2015 05:16
		Re: Speed does matter By: chris_torrence@NOSPAM on Thu, 20 August 2015 10:47
		Re: Speed does matter By: Kallisthène on Fri, 21 August 2015 01:09
		Re: Speed does matter By: Dae-Kyu Shin on Mon, 24 August 2015 21:34
		Re: Speed does matter By: markb77 on Tue, 25 August 2015 01:32
		Re: Speed does matter By: Kallisthène on Tue, 25 August 2015 06:03
		Re: Speed does matter By: Michael Galloy on Tue, 25 August 2015 14:35
		Re: Speed does matter By: Kallisthène on Wed, 26 August 2015 01:41
		Re: Speed does matter By: Kallisthène on Thu, 03 September 2015 00:47
		Re: Speed does matter By: Kallisthène on Mon, 17 October 2016 00:17
		Re: Speed does matter By: wlandsman on Mon, 17 October 2016 11:34
		Re: Speed does matter By: Markus Schmassmann on Tue, 18 October 2016 03:35
		Re: Speed does matter By: chris_torrence@NOSPAM on Thu, 13 August 2015 14:21
		Re: Speed does matter By: Kallisthène on Fri, 14 August 2015 04:59

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