Hi, In the previous message Mr.Mathias said I have a little time for to attend this project (as I am doing now). I don't have time for to read all the interesting things which I see every day, but to attend the boost community is easy and a pleasure for me It is a stange situation. I am the author, and say “the suballocator is a pool allocator, and when have a chuck of memory free, return it to the allocator”. Mr Mathias respond that according the theory, a pool allocator don't do that and if do, it have a great cost in performance. The suballocator is the empirical demostration that this theory is not correct. If someone want to know anything about the library, the algorithms , the implemention..., ask me, and I will respond you with all my interest. But I can't accept when someone say me that the things I had done in this library , can't be done according a theory. I apologize to the Boost community by the rough style of my previous message. I have no excuse. I am sorry Yours Francisco Tapia