Re: Storage management

[sjw <simon.j.wright@mac.com>]

On Nov 1, 11:13 am, Florian Weimer <f...@deneb.enyo.de> wrote:
> What is the current state of the art with regard to programmer support
> for storage management?
>
> With GNAT, Ada.Finalization adds tons of run-time calls to deal with
> abort deferral (even with pragma Restrictions (No_Abort_Statements)),
> puts the object on some sort of list, and does some secondary stack
> allocations which I don't understand.  Clearly, this is not supposed
> to be used in performance-critical code, so I doubt it can be used for
> a generic smart pointer implementation.  (Object allocation in inner
> loops is generally a bad idea, but this overhead is also incurred when
> copying smart pointers around.)

It has to depend on how fast a processor you can afford to buy for
your application. Here (2.4 GHz Macbook Pro, GCC 4.3.0) it takes 150
ns to allocate/free a character vs 1050 ns for the (rough) equivalent
using a BC smart pointer.