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[Python-Dev] PEP czar for PEP 3144?

On Tue, Mar 20, 2012 at 8:34 AM, Guido van Rossum <guido at python.org> wrote:

> Anyway, I also tried to imply that it matters if the number of list
> items would ever be huge. It seems that is indeed possible (even if
> not likely) so I think iterators are useful.

But according to Nick's post, there's some sort of uniquification that
is done, and the algorithm currently used computes the whole list anyway.

I suppose that one could do the uniquification lazily, or find some other
way to avoid that computation.  Is it worth it to optimize an unlikely case?