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Re: Modifying an array while conserving memory [message #30956 is a reply to message #30875]

Fri, 24 May 2002 09:33

Pavel A. Romashkin
Messages: 531
Registered: November 2000

Senior Member

I think I have evidence that it does. I have had on several occasions
ran out of ram (on a Mac with 1.5 Gb of RAM), and Temporary did help.
But, again, Temporary only is useful when data is changed, not for
reallocation of any kind or operations on array subsets.
When working with large datasets, efficient use of RAM is a must,
otherwise you simply can't run the program.
I can relate to the original question, and think that if you really run
into RAM limitations, you have to know first what is the size of the
inserted array and allocate that ahead of time. Reallocating large
arrays is, first, very slow, and secondly is almost impossible once you
reach the limit of unfragmented memory page.
I found that once you are in this realm, it makes a big difference when
and how you allocate even small variables because contiguous RAM becomes
more important than the total RAM.
Cheers,
Pavel

Craig Markwardt wrote:
>
> Also, to this day I have strong doubts whether the TEMPORARY()
> operator actually saves memory, *during* the operation. [ Of course
> it saves memory afterwards since the variable's memory is released. ]

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[Message index]

		Re: Modifying an array while conserving memory By: R.Bauer on Fri, 24 May 2002 02:49
		Re: Modifying an array while conserving memory By: Randall Skelton on Fri, 24 May 2002 02:06
		Re: Modifying an array while conserving memory By: R.Bauer on Thu, 23 May 2002 23:44
		Re: Modifying an array while conserving memory By: Craig Markwardt on Thu, 23 May 2002 20:03
		Re: Modifying an array while conserving memory By: David Fanning on Thu, 23 May 2002 19:58
		Re: Modifying an array while conserving memory By: Pavel A. Romashkin on Fri, 24 May 2002 09:33
		Re: Modifying an array while conserving memory By: Randall Skelton on Fri, 24 May 2002 04:45

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