[jdom-interest] Performance tests

[Jason Hunter]

philip.nelson at omniresources.com wrote:
> 
> I have included the patch for Element which should go in any case.
> removeAttribute is called *every time* setAttribute is called, whether it
> needs to be or not.  This means iterating through the entire list multiple
> times for every call.  My patch eliminates this for the most normal case of
> building a new document from xml source.

Good one.  Just checked it in.

-jh-