1. A system to support mutable object handling, comprising: one or more microprocessors; a cache space that is capable of storing one or more mutable cache objects; one or more cached object graphs, wherein each said mutable cache object is reachable via one or more retrieval paths in the one or more cached object graph; and a mutable-handling decorator, running on the one or more microprocessors, that maintains an internal instance map that transparently translates between the one or more cached object graphs and the one or more mutable cache objects stored in the cache space.