How could I make this script run a bit smoother (iOS)? Any Ideas?

I apologize to ask so blatantly, but the script works perfectly, but it just seems to be a bit laggy. Its a control script where you can only drag horizontally to look, and press two fingers to move forward.

So it works exactly like I want it to, but when you drag to look around, it does seem to react a bit slow. Is there a flaw in the script? Any ideas on how to fix this? Or is my script just really inefficient.

Any help would be great, thanks.

   #pragma strict
         var speed : float = 6.0;
     //    var jumpSpeed : float = 8.0;
         var gravity : float = 20.0;
         private var moveDirection : Vector3 = Vector3.zero;
     private var h : float;
     private var v : float;
      var horozontalSpeed : float = .5;
      var verticalSpeed : float = 0.0;
      
     function Update()
     {
         if (Input.touchCount > 0){
             var touch : Touch = Input.GetTouch(0);
                 if (Input.touchCount == 1){
      horozontalSpeed = 1.56;
      }
             if (touch.phase == TouchPhase.Moved)
             {
                 h = horozontalSpeed * touch.deltaPosition.x ;
                 transform.Rotate( 0, -h, 0, Space.World );
      
               //  v = verticalSpeed * touch.deltaPosition.y ;
               //  transform.Rotate( v, 0, 0, Space.World );
             }
         }
     if (Input.touchCount > 1){
     horozontalSpeed = 0.926;
     
         //speed = 1.0;
             var controller : CharacterController = GetComponent(CharacterController);
             if (controller.isGrounded) {
                 // We are grounded, so recalculate
                 // move direction directly from axes
                 moveDirection = Vector3(Input.GetAxis("Horizontal"), 0,
                                         Input.GetAxis("Fire1"));
                 moveDirection = transform.TransformDirection(moveDirection);
                 moveDirection *= speed;
                 
     
             }
             // Apply gravity
             moveDirection.y -= gravity * Time.deltaTime;
             
             // Move the controller
             controller.Move(moveDirection * Time.deltaTime);
     }
     }