I would use byte array instead of strings, as they should be supported by everything and they are more compact. But I'm crazy guy who wants to optimize everythi

I would use byte array instead of strings, as they should be supported by everything and they are more compact. But I'm crazy guy who wants to optimize everything, I think that in reality string will work just as well and probably easier to debug when you need to deal with it (also easier to serialize if you need to pass it around).