[webkit-dev] When to use FastAllocBase?

[Tony Gentilcore]

For general reference, when is it appropriate to use FastAllocBase?

If you subclass RefCounted<T> or Noncopyable, which is very common,
you pick up FastAllocBase. So, my naive guess is that any class/struct
which doesn't pick up FastAllocBase through its inheritance chain
should subclass it directly. Is that a reasonable guideline?

Thanks,
-Tony