comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » memory allocation

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Memory Allocation [message #38057 is a reply to message #16460]

Sun, 15 February 2004 05:40

justspam03
Messages: 36
Registered: October 2003

Member

Hi Neil,

Which IDL version do you use? It seems that memory handling
has improved quite a bit going from version 5.6 to 6.0.
Under 5.5/5.6 we observerd the following:

version a)
1) allocate large chunk of memory
(1200 objects, ca. 100MByte total)
2) allocate another chunk of memory
and resort data from 1) into this space
3) destroy objects allocated in step 1)
as they're not needed any longer
4) perform calculations on data located
in memory (from step 2)

version b)
exactly as a), but do not destroy objects
in step 3

Surprisingly version a) ran *much* faster (we're
talking about a factor of ~5) than version b)
Any idea why?
Seems this is not the case in 6.0 any longer.
Object destruction is quite a bit faster, too.
Kind regards,
Oliver

Report message to a moderator

[Message index]

		memory allocation By: Essa Yacoub on Mon, 26 July 1999 00:00
		Re: memory allocation By: Craig Markwardt on Wed, 28 July 1999 00:00
		Re: memory allocation By: David Ritscher on Wed, 28 July 1999 00:00
		Re: Memory Allocation By: justspam03 on Sun, 15 February 2004 05:40

Previous Topic:	Memory Allocation
Next Topic:	Savgol - Differentiation problems

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:49:53 PDT 2025

Total time taken to generate the page: 0.00389 seconds