On 17 Sep 2013, at 2:38 AM, Marcel Weiher <marcel.wei...@gmail.com> wrote:
> On Sep 16, 2013, at 18:51 , Jeffrey Oleander <jgo...@yahoo.com> wrote:
>
>> If you want to know the total number of objects to be archived, then you
>> need to count them, at some time or another. To count them, you need to
>> walk the object tree before you start actually archiving... which may take
>> a significant fraction of the time it takes to archive.
>
> I doubt that walking the object tree to count would take a significant amount
> of time, unless you have something really weird going on with your data
> structures.
>
> For example, I recently ran some tests on keyed archiving with a 3 level tree
> of slightly more than 1M objects total. Archiving with keyed archiver took
> >9s, unarchiving 2.6s, creating the tree 200ms and counting it 16.5ms.
>
> So counting the objects took less than 1% of the time of unarchiving, and
> less than 0.2% the time of archiving, in both cases the time is negligible.
I'm curious (and I admit to being a bit foggy this morning). The NSCoder family
has long supported graphs that are not directed-acyclic, or in which objects
have more than one reference. How did you handle that?
— F
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