Fastest message sending

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Hi
One of my games does multiplayer purely through message sending. Everything is just messages sent to other clients. My custom Transform also does this, whenever player moves sufficiently far it sends unreliable messages to others.
Just yesterday I started using Photon and I am only familiar with PunRPC and RaiseEvent and I am using RaiseEvent for sending transform position to others.
Is there any faster way to fire simple unreliable messages to others that I should use?
Thank You