I have once played with changing how the buffers are created on JBM 2, and I'm sure we don't need auto-expanding buffers. When we send a message, we could verify the getEncodeSize(), and pre-allocate the buffers at the exact size necessary to send them. It shouldn't be too difficult of doing that. So, if you (Trustin) are having issues with the auto-expanding buffer, I'm pretty sure we can get rid of that. (At least on sending.. I'm not sure how the buffers are created on reading). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171387#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...