RE: Based variables

["Sims, Ken" <KSIMS@xxxxxxxxxxxxxxxx>]

Hi Mark -

>>Yes, you use ALLOC the 1st time, and REALLOC every record after that.  It
>>would help performance some to ALLOC 500 hundred records, though it seems
>>extremely fast just ALLOCating 1 record at a time.
>
>  It just seems to be a waste for the system to keep allocating the same 
>data over and over again. So if I have 4,500 records, I've ALLOCated 4,500 
>times instead of 9 times.

The ALLOC and REALLOC operations allocate memory in multiples of 4K.  So if
you allocate 240 bytes, then turn around and REALLOC for 480 bytes,
persumably the memory allocation handler is smart to realize that the memory
is actually already allocated and just return a sucess code, keeping the
process very fast until an additional 4K is actually allocated.

So for efficiency you should never make a request that would be satisified
within the same multiple of 4K as you have already requested.

So an alternate method of allocation, in place of allocating memory based on
some number of elements to be held, is to allocate memory in chunks based on
4K or some multiple thereof, then calculate how many elements can fit.

Ken
Southern Wine and Spirits of Nevada, Inc.
Opinions expressed are my own and do not necessarily represent the views of
my employer or anyone in their right mind.

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