For-Loop vs Broadcast

Hi.

Im having a question about performance of the gameserver:

So, Im sending stuff from a client to a server.
And now that stuff should be send to any other player in order to sync up.
Which version of those two here costs more performance:

for(var i = 0; i < Users.Length; i++) { Users[i].Send("direction_change", m.GetString(0), m.GetInteger(1)); }

Or

Broadcast("direction_change", m.GetString(0), m.GetInteger(1));

Notes:
m.GetString(0) -> Contains the data I want to send
m.GetInteger(1) -> Contains the player ID which this affects

Hope some1 can answer this question as Im not sure which way eats up more performance (and this code will be executed very often on my server...).

Best regards

I'd use broadcast personally.