Unfortunately I am too late to edit, but actually I simply misunderstood that the member function pointer would do dynamic dispatch. Somehow after all of these

Unfortunately I am too late to edit, but actually I simply misunderstood that the member function pointer would do dynamic dispatch. Somehow after all of these years, I never used that feature. (Although it explains some of the extra bytes needed in a member to function pointer; prior to now I was only aware of the this pointer offset part.)