Move script for mobile

Hi, im doing a simple 2d game, the player can move to the right or to the left,I'm using OnPointerUp and OnPointerDown to read when the player press the button and when he releases the same, i recently found a topic about raycasts, and im thinking if they can be used to read de player input more efficiently and with a lesser cost.
Here is the scipt that I'm using:

Code (CSharp):

1.  
2.     public float speed = 10;
3.     Rigidbody2D myBody;
4.     float hInput = 0;
5.     float aux;
6.    
7.     void Start ()
8.     {
9.       //Gerenciar Naves just a simple class to store information about the player: chosen ship, ship speed, hp, etc...
10.         myBody = this.gameObject.GetComponent<GerenciarNaves> ().Nave_Escolhida ().GetComponent<Rigidbody2D> ();
11. //NaveEscolhida() return a GameObject(Ship) from a array of ships
12.         aux = this.gameObject.GetComponent<GerenciarNaves> ().SpeedFactor;
13.     }
14.    
15.     void FixedUpdate ()
16.     {
17.         Move (hInput);
18.     }
19.    
20.     void Move(float PInput)
21.     {
22.         Vector2 moveVel = myBody.velocity;
23.         moveVel.x = PInput * speed;
24.         myBody.velocity = transform.right * (PInput * speed);
25.     }
26.    
27.     public void Direita()//Right
28.     {
29.         hInput = aux;
30.     }
31.  
32.     public void Esquerda()//Left
33.     {
34.         hInput = (aux * -1);
35.     }
36.  
37.     public void StopMoving()
38.     {
39.         hInput = 0;
40.     }

 

So um... what's the problem/question?

 

Raycast can be more efficient to read user inputs or OnPointerUp and OnPointerDown are better choices...