> With Perl6, few people will compile whole librairies but most
> will load bytecode. At this late stage there is little place for
> tunable optimization except JITting or it would defeat the
> sharing of such code between different intances of Perl6. Nothing
> will preclude to dynamically extend classes. I note that in Perl6
> many optimizations were autoloading for deferring compilation of
> material until it's really needed. With bytecode, it makes sense
> (at least optimization-wise) that the programmer decides if his
> classes will be sealed or some methods to be final because at the
> user level it is too late to decide.