class of the object because it will return class of delegator (<code>PersistentDelegator</code>.

<LI>Delegators adds extra space and CPU overhead (instead of one instance of the object we have two and 
each method invocation requires extra redirection). 
</OL>
That is why delegators are also switched off by default. To enable them, set <code>USE_DELEGATOR = false</code>
in dybase.rb.<P>

Ruby has normal (mark-and-sweep) garbage collector so it is not suffer from cyclic references.
It support big numbers bu