On Friday 07 December 2007 10:44, Jean-Christophe Filliâtre wrote:
> Xavier Leroy wrote:
> >> Also, is there a simple way to implement a function (perhaps using
> >> Obj.magic) which will walk a (possibly circular) network of tuples,
> >> arrays, variadic entities and lists, and return the total number of
> >> bytes used up by that structure? I see that this should be possible
> >> in principle with the present implementation of the runtime if one
> >> could get some basic information about the internal type of an
> >> array.
> >
> > Jean-Christophe Filliâtre's "size" library does exactly this:
> >
> >        http://www.lri.fr/~filliatr/software.en.html
>
> Indeed. However, note that it uses internally a hash table to store
> blocks already considered (in order to correctly account for sharing),
> and thus it is potentially incorrect if the GC moves some blocks during
> the count, for instance during a resizing of the hash table (which
> triggers the GC). I don't know how to avoid this issue; any help is
> welcome.

Yes. I wanted this functionality as well and tried your "size" library but it 
only segfaults on my machine. Presumably this must be written in C to avoid 
using the GC?

Perhaps this would be a good product... :-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
http://www.ffconsultancy.com/products/?e