CairoNative&Blockifier - Juno impact analysis

[stranger80]

CairoNative is expected to be integrated in Starknet Blockifier by beg of October.
As per comment from @DomHenderson:
Only thing I can think of that's relevant is that the program cache for native compiled classes is (currently, and I doubt it'll change. It's the ProgramCache class from cairo native) not thread safe, and a very rust specific object, so idk if there's any way to persist it between calls to the rust VM, but it'll be very beneficial to do so if you can find a way

Please produce impact analysis and indicate changes required in Juno