Hi, as i promised, after some testing i changed the 1.2 version from #development blessing to #release. Here some more changes: - reorganized categories (mainly cleaning up the NativeBoost-Core category and move some stuff to NativeBoost-Core-FFI category) But this one might be interesting even to non-NB users: i added a fresh implementation of weak finalization registry (NBFinalizationRegistry). In short: - it's not using WeakIdentityDictionary to store registered objects - it produces less garbage, under high add/finalization pressure - it does not allows removal of object once it is registered, since it doesn't pretends to be a Collection, like WeakRegistry does. - if you really need to avoid executing the finalization, use the object returned by #add: method, which is an instance of NBWeakFinalizerItem and send #doNotFinalize message to it (note, any other methods are considered private and messing up with them can be fatal) You can extract implementation and use it without loading NB, but it will work only under VMs with support of new finalization scheme. (but since NB-enabled VMs already having it, i can afford to use it, without having crippling backwards compatibility schemes) -- Best regards, Igor Stasenko.