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Re: Random-access of List() progressively slower for static list [message #88515 is a reply to message #88512]

Mon, 05 May 2014 05:28

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

> Oops, too quick there. jj should be ii[jj]. Complexity no longer peculiar, only the overall slowness.

Just saw that you already corrected this... sorry for the double correction. However, terribly slow.

>> In the first part, exchanging active and commented-out equivalent code gives equally unsatisfactory results in the list creation phase.
>
> This comment still holds.

I hope at least that the explanation helps (linked list)

>> List(), for all its nice properties, is not fit for (my) purpose in this version of IDL.
>
> This comment still holds.

Did you consider a pointer array? This should be much quicker in the random access.

>> Processed 45000 elements, the last 5000 in 72.3194 seconds
>
>
>
> With actual random access, the first 5000 accesses are all that are finished in the time I takes me to write this:
>
>
>
> Processed 5000 elements, the last 5000 in 398.297 seconds

Yes, you were patient. I reduced 5000 to 500 and let it run only once...

Cheers,
Helder

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[Message index]

		Random-access of List() progressively slower for static list By: tom.grydeland on Mon, 05 May 2014 04:34
		Re: Random-access of List() progressively slower for static list By: tom.grydeland on Mon, 05 May 2014 04:59
		Re: Random-access of List() progressively slower for static list By: Helder Marchetto on Mon, 05 May 2014 05:28
		Re: Random-access of List() progressively slower for static list By: Helder Marchetto on Mon, 05 May 2014 05:25
		Re: Random-access of List() progressively slower for static list By: tom.grydeland on Mon, 05 May 2014 06:25

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