Not for pure python code; but there's massive advantages for mixed C(++) and Python: I can now have multiple sub interpreters running concurrently and accessing the same shared state in a thread-safe C++ library.
Previously this required rewriting the whole C++ library to support either pickling (multiplying the total memory consumption by the number of cores), or support allocating everything in shared memory (which means normal C++ types like `std::string` are unusable, need to switch e.g. to boost::interprocess).
Now is sufficient to pickle a pointer to a C++ object as an integer, and it'll still be a valid pointer in the other subinterpreter.
Previously this required rewriting the whole C++ library to support either pickling (multiplying the total memory consumption by the number of cores), or support allocating everything in shared memory (which means normal C++ types like `std::string` are unusable, need to switch e.g. to boost::interprocess).
Now is sufficient to pickle a pointer to a C++ object as an integer, and it'll still be a valid pointer in the other subinterpreter.