Is there a better way to simulate a vacuum or kirby like suction that doesn't kill frame rate?

Hello,

I'm trying to create the shrink/suction mechanic from Kirby or Luigi's Mansion. The Main character has a vacuum that he uses as a gun. Right now, we are using a Raycast that generates when the player presses the right mouse button down. If the Raycast hits a collider with a RigidBody, The ray shrinks the object, and draws it closer to the player. Here's the code: The great thing is, it works. The problem is if there is more than one enemy on screen, the frame rate falls way down.

My Question: Is there a better way to simulate a vacuum or kirby link suction that doesn't kill frame rate? Any Help would be amazing! Thanks.

     if(lastAtk + rateOfFire<=Time.time)
  {
  lastAtk=Time.time; //reset last time we attack to  put gap between attacks. (AKA rateof fire)
  print(&quot;bang!&quot;);
  //...draw a Ray cast forward
  var hit : RaycastHit;
  ray = new Ray (arm.transform.position, (targetPoint-arm.transform.position).normalized);
  Debug.DrawLine(arm.transform.position, targetPoint, Color.yellow,1);
  if (Physics.Raycast (ray, hit, range))
  {
  //print(hit.transform);
  //if ray collides with an enemy
  var hitTag = hit.collider.tag;
  if(hitTag=="Enemy")
  {
  //Debug.Log("enemy hit");
  
  
  hit.transform.gameObject.SendMessage("ApplyDamage",10,SendMessageOptions.DontRequireReceiver);
  
  print(transform.root.name+" attacked!");
  }
  
  //apply a force to the enemy to "suck"; them up
  //         if (hit.collider.attachedRigidbody) 
  //         {
  //         var dir : Vector3 =  arm.transform.position -hit.transform.position ;
  // dir = dir.normalized;
  //          hit.collider.attachedRigidbody.AddForce((dir) * power);
  //          //shrinks enemy
  //          var locScale: Vector3 = hit.transform.localScale;
  //          if(locScale.x&gt;=.1){hit.transform.localScale -= Vector3.one*Time.deltaTime*shrinkSpeed;}
  //          else{hit.transform.localScale=Vector3(.1,.1,.1);}
  //          }
  
  } 
  }

Here is the 'shrink' part of the code

     //apply a force to the enemy to "suck" them up
  //         if (hit.collider.attachedRigidbody) 
  //         {
  //         var dir : Vector3 =  arm.transform.position -hit.transform.position ;
  // dir = dir.normalized;
  //          hit.collider.attachedRigidbody.AddForce((dir) * power);
  //          //shrinks enemy
  //          var locScale: Vector3 = hit.transform.localScale;
  //          if(locScale.x>=.1){hit.transform.localScale -= Vector3.one*Time.deltaTime*shrinkSpeed;}
  //          else{hit.transform.localScale=Vector3(.1,.1,.1);}
  //          }