Moving object smoothly to moving location

I have object that have to move to selected cordinates.
I’m using this atm:
iTween.MoveTo(gameObject,{“z”:posZ,“x”:posX,“y”:posY});

Only problem is that it laggs when I change cordinates when object is moving. When it has static cordinates, game runs fine. Is there anyway to remove lagg?

I can give more information if you dont know what I mean.

You should use MoveUpdate instead of MoveTo when you have changing values.