Thanks. I will try this when there's time.
Cheers,
Dimitre
On 6/17/05, Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/w@xxxxxxxxxxxxxxxx> wrote:
> > If I understand well, this means that with the virtual copy
> > optimization performing N "assignments" will require only
> >
> > O(N) total space
> > vs
> > O(N^2) total space without the optimization.
> >
> >
> > Is this right, Mike?
> >
>
> I think on reflection that the virtual copy mechanism won't be invoked in
> your example: copy-of will only result in a virtual copy if the node created
> is not being attached as a child to another node. The original node can have
> a parent, but the copy can't.
>
> I suspect you would actually get better performance by doing a copy that
> excludes the value being "updated". The extra filtering cost would be more
> than compensated by the fact that the size of the environment doesn't
> continually increase.
>
> Michael Kay
>
>
>
>
>
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