tenderlove / ruby-lang.org wrote:
> I've attached a patch that adds `nil` to the optimized case such that
> the above code will use `opt_case_dispatch`.  My patch defines `===`
> on `nil`, then adds nil to the list of "optimizable literals".

Cool.  Might be worth it to do the same for `true` and `false`,
too, since we have space for them.