What If I Want References, Not Lists?

• Challenge: Most List::Compare methods return a list. What if I only need that list as input to some other function?

      @union = $lc->get_union;
      some_other_function(@union);

  Wouldn't it be faster if I just returned and passed an array reference?

• Response: Parallel methods which return references

      $unionref = $lc->get_union_ref;
      some_other_function($unionref);