On 5/1/17 2:55 PM, Eliot Miranda wrote:
> Alas no.  The problem with String's subclasses is that they're binary
> objects.  They have no inst vars in which one can cache a hash.

I see. That suggests a deeper refactoring, of course, to separate the
vector of bytes from the rest of the instance, at least in some cases.
It'd be a lot of design and implementation work.