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I just use the lua registry as my "no environment" value. since It's
already "on the stack", you can compare it right away.

On Fri, Feb 15, 2008 at 12:32 AM, Chris <coderight@gmail.com> wrote:
> On Thu, Feb 14, 2008 at 8:47 PM, Daniel Stephens
>  <daniel@danielstephens.com> wrote:
>  >  Can you not create a single 'virgin environment' for those which haven't
>  >  been re-assigned and detect them that way?
>  >
>  >
>
>  Thanks, yes that is something I thought of after I posted this and it
>  might work.  This is being used in performance critical code so I have
>  been tweaking everything for that.  I'm not sure if it will be an
>  unacceptable performance hit or not compared to just testing for an
>  empty environment (which is most of the objects; there are tens of
>  millions of them).
>
>  CR
>