Unlike the tie-based Data::Lazy, this module operates on values, not
variables. Therefore, assigning into $dv and $lv above will simply
replace the value, instead of triggering a STORE method call.

Also, thanks to the overload-based implementation, this module is
about 2x faster than Data::Lazy.

WWW:	http://search.cpan.org/dist/Scalar-Defer/