The "Event Trigger" Component makes more process to the game that use a collider and use this in the script when I use "onMouseDown" function?

I made a button with the new UI tools that use Canvas. I Ask this question because usually I use the onMouseDown function when I want to get the mouse event, but if I use the "Event Trigger" Component I can find the same function "onMouseDown". So please tell me if it's the same process to the game or the "Event Trigger" component its more heavy that the function OnMouseDown in the script