RE: [Incrtcl-users] incrTcl objects memory useage

[Ard-Jan G. - C. T. E. - S. S. <Ardjan.Glas@Sun.COM>]

There is a design pattern "flyweight", that gives a solution to
handling multiple objects with limited resource available.

It's in the book design patterns by Enrich Gamma ISBN 0-201-63361-2

>From: "Techentin, Robert W." <tec...@ma...>
>To: Inc...@li...
>Cc: cra...@al...
>Subject: RE: [Incrtcl-users] incrTcl objects memory useage
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>X-Original-Date: Thu, 11 Apr 2002 09:46:41 -0500
>Date: Thu, 11 Apr 2002 09:46:41 -0500
>
>
>> I was wondering if anyone out there has done any sort of 
>> investigation on how much memory incrTcl objects use up. The 
>> reason I am asking is that we are developing a system that 
>> uses a LOT of objects, and we want to know if there are some 
>> ways of designing our classes to cut down on some of the 
>> memory requirements (of course at the same time we don't
>> want to just throw away any of the useful OO concepts).   Some of the
>> info I am looking for:
>> 
>>   - how much memory does an empty object use?  Is this system 
>> dependant?
>> 
>>   - does inheritence of a class increase object size by the 
>> size of the inherited class, or is there some overhead 
>> involved, or is the inheritiance process optimized somehow?.
>>   - how much memory do methods use up?  Is this per class or 
>> per object?
>> 
>>   - do properties use up memory apart from the data they are storing
>> (overhead)
>
>
>Some of this you can glean from "Memory costs with Tcl" at
>http://mini.net/tcl/1617.html
>
>For the Incr Tcl specific stuff, I'd suggest making some measurements.  You
>can recompile with the TCL_MEMORY_DEBUG flag, as shown on the wiki page, or
>just use a system memory display and create lots and lots and lots of
>objects.
>
>My guesses are that object memory use is probably constant across 32 bit
>machines, and that inheritance and methods would increase memory consumption
>on a per-class basis, but not on a per-object basis.  Properties
>(variables), on the other hand, should increase memory consumption on a
>per-object basis, probably pretty much as described on the wiki page.
>
>Bob
>-- 
>Bob Techentin                        tec...@ma... 
>Mayo Foundation                                 (507) 538-5495 
>200 First St. SW                            FAX (507) 284-9171
>Rochester MN, 55901  USA            http://www.mayo.edu/sppdg/ 
>
>
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