"FredrikJ" wrote : Using the testbeds from above on CR3 shows a significant improvement over CR2. The source for the tests can be found here: http://www.robotsociety.com/cache/cr3/src.rar | Hi FredrikJ, I have recently proposed a new locking strategy that would allow for non-blocking concurrent reads. If you are interested look it over, and let us know your thoughts. -Jason View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064632#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...