OK, so my preliminary testing & tuning is showing that for large batches of Serializable or Externalizable objects, my default implementation is around twice as fast as the standard one (this is without using class or instance tables; though that would speed things up a little, large batches will benefit less from class tables than small batches will). I've only tested with Sun 1.5 and 1.6, 32- and 64-bit JVMs on Linux x86_84 though. I've yet to do a real test with many small batches. When I've gotten all this testing done I'll do up some pretty charts or something. More news as it comes in... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4179451#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...