On Wed, Oct 23, 2013 at 4:31 AM, Gergely Risko <gerg...@risko.hu> wrote:

> I can understand that this may be slower in CPU, but can you please
> elaborate why would it be worse in memory, how the frees wouldn't happen
> in a "timely manner"?  I thought finalisers are called when the
> referencee is GCd, so if we free the mpz in the callback, then where are
> we going wrong?
>

There is no guarantee that finalizers will be called at all, much less that
they will be called in a timely manner. This is a general and well-known
property of all garbage collectors, not something unique to GHC.
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