I've been hit by a few side effects of using proxies (GLORP ones), because some tools like the Debugger and/or inspectors expect some objects to respond to methods not defined in ProtoObject. I discovered this by accident because looking at the stack in the xterm console I saw a recursion triggered by a halt in UnitOfWork>>#register: Such halt caused errors that needed to be printed, and because it was trigger in the context of a Proxy, boom, infinite recursion. Why such methods are not implemented in ProtoObject, or at least with a "basic" version of it. Is this by design? Methods like #shouldBePrintedAsLiteral or #isSelfEvaluating (don't know what it means), along others like #printStringLimitedTo... etc. I remember Steph said a better support for Proxies was in the was roadmap, how far is that? What can be done to speed this up? Debugging a proxy object (even one that doesn't use #become:) is really tricky. If you look at the implementation of Glorp's Proxy>>#class it seems it should answer the class of the proxied object (if materialized), but all that is commented out returning the receiver class, it is returning Proxy. If you uncomment that weird things happen. I'll come back to this later, once I have time to reproduce it. Please don't forget not everything inherits from Object :) Esteban A. Maringolo