[fpc-pascal] New object created in custom pool

[Jonas Maebe]

On 28 Oct 2008, at 16:50, JoshyFun wrote:

> Hello Jonas,
>
> Tuesday, October 28, 2008, 4:24:56 PM, you wrote:
>
>>>> My application will create thousands of small objects of the same
>>>> class, this objects are not created or destroyed in a row, so  
>>>> memory
>>>> fragmentation could becomes a serious problem after some time.
>>> Since the fpc heap manager itself pools, this should be a non issue.
> JM> It depends on how small the instances are.
>
> The "problem" is that most objects are quite small, two pointers and
> two int64 values (maybe 2 pointers more in a near future), but it must
> be a class instead a record because it could be overriden and
> specialized for other minor tasks (minor in the
> amount of created objects). The big "but" is that the creation of this
> objects will be in blocks of around 100

100 bytes and smaller are most certainly handled using pools by FC's  
heap manager.

> in average and every each
> block some big objects are created and many times allocation pages
> seens to be only half filled using the calculator

The calculator and which base size? Did you call instancesize to see  
how much space is required for each instance?


Jonas