Possible performance enhancement on NetworkingMessages::send_message_to_user #283
Description
Currently, send_message_to_user accepts the structure of NetworkingIdentity for its "user" argument. However, the memory size of NetworkingIdentity is quite large. If the send_message_to_user is not inlined during compilation, calling this method may cause overhead especially when the game calls it very often.
Changing it to passing a reference may improve performance.