Drag+an+object+to+touch+position(Problem)

Hello i am using the below code to move the gameobject to the screen touch position.

 using UnityEngine;
 using System.Collections;
 
 public class dragtheobjectontouch : MonoBehaviour {
 
     public GUIText debugtext;
     public GameObject dragobject;
     public Vector2 realworldposition;
     
     void Awake()
     {
     Application.targetFrameRate=60;
     }
     
     void Update () {
     if(Input.touchCount>0)
         {
         foreach(Touch touch in Input.touches)
             {
             if(touch.phase==TouchPhase.Moved)
                 {
                 debugtext.text=touch.position.ToString();
                 realworldposition=Camera.main.ScreenToWorldPoint(touch.position);
                 dragobject.transform.position=new Vector3(realworldposition.x,realworldposition.y,dragobject.transform.position.z);
                 }
             }
         }
     }
 }

The Code works perfectly and the object follows(moves) to position of the touch. But when i quickly move my finger on the touchscreen(ipad) the object lags behind the finger. Of course it reaches the actual position of the touch if i slow down the movement of my finger. This problem doesnot occur if i move my finger slowly on the screen. Can anybody help me on this .?