> The standard C++ vector<> container is almost perfect for use in Perl
> arrays and the data stack.  But it has a major weakness...  It's _so_
> general that it doesn't use memcpy() [or moral equivalent] when it has
> to grow.  Instead, it uses copy constructors in a loop.  That could be
> a major performance issue with vector<Counted_p<T>>.

Have you considered deque<>? It doesn't copy the elements when

> Now, I could write a vector<>

Do you mean a vector_Counted_p<>? Better create a partial
specialization of vector<>:

        template<class T, class A>
        class vector<Counted_p<T>, A>
                // ...
Jean-Louis Leroy

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