One possible concern with proxies is the overhead of separate proxy and handler objects, and trap methods that likely close over a backing object. This concern would be exacerbated in the case of value proxies, where we might want millions of complex number proxies, and also came up in the discussion of the Observer use case last week.
It seems it would be nice to allow proxy objects to have some state. Since accesses to the proxy would trap to the handler, we need an alternative way for the handler to access the proxy state, perhaps Proxy.untrappedGetOwnPropertyDescriptor(proxy, name), etc. This might allow us to proxify existing objects to attach an Observer without introducing much additional, per-object overhead. - Cormac _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
