Real DTD Caching

For performance reasons we extended the "reuse" feature of the 1.4 version to a
real caching mechanism. This was rather simple and the changes were all at one
place (DTDValidator). This brought us a great performance boost. Now I'm
looking through the new version and find it very complicated to achieve the
same (you guys broke up the DTDValidator). As I see it now it would meen a
heavy code change, which I want to avoid.
Is there a possibilty to get such an enhancement in the next version. I would
be glad to send you the files we changed to achieve it in 1.4