Line Following Mouse

Question

Hi
Actually I already have a class that does this exact thing
you can enjoy it here - http://megaswf.com/serve/1154775
if you play around with it you will notice that the frame rate drops significantly when you move the mouse fast for a long time,
especially if you add more objects and logic to the game (press space and see what happens )
my question is how can I make this efficiant and not affect the frame rate.
heres the code:
package 
     import adobe.utils.ProductManager;
     import flash.display.DisplayObject;
     import flash.display.DisplayObjectContainer;
     import flash.display.MovieClip;
     import flash.display.Sprite;
     import flash.events.Event;
     import flash.events.MouseEvent;
     import flash.geom.Point;
      * @author Gadi G
     public class MouseHandler extends Sprite
          private  var _stage:DisplayObjectContainer;
          public var _bDraw:Boolean = false;
          private var _arrLine:Array = new Array();;
          private var _angle;
          private var _p1:Point =  new Point();
          private var _p2:Point = new Point();
          private var cos:Number;
          private var sin:Number;
          private var lineDrawing:Line;
          private var angle;
          private var distance:uint;
          private static var instance:MouseHandler;
          public var _mousePos:Point = new Point();
          public function MouseHandler()
          public static function getInstance():MouseHandler
               if (instance == null)
                    instance = new MouseHandler();
               return instance;
          public function startListening(prnt:DisplayObjectContainer)
               _stage = prnt;
               _stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
               _stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
          private function mouseDownHandler(e:MouseEvent):void
               _bDraw = true;
               _p2.x = mouseX;
               _p2.y = mouseY;
               _stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
               _stage.addEventListener(MouseEvent.MOUSE_MOVE, drawMouseLine);
          private function mouseUpHandler(e:MouseEvent):void
               _bDraw = false;
               _stage.removeEventListener(MouseEvent.MOUSE_MOVE, drawMouseLine);
          private function enterFrameHandler(e:Event):void
               for each (var s:Line in _arrLine)
                    s.scaleX = s.scaleY *=  .79;
                    // the lowest possile value is one twip which is 0.05
                    if (s.width < .7)
                         _arrLine.splice(_arrLine.indexOf(s), 1);
                         _stage.removeChild(s);
                         s = null;
               if (!_bDraw)
                    //_mousePos = null;
                    if (_arrLine.length == 0)
                         _stage.removeEventListener(Event.ENTER_FRAME, enterFrameHandler);
               _mousePos.x = mouseX;
               _mousePos.y = mouseY;
          private function drawMouseLine(e:MouseEvent):void
               _p1.x = mouseX;
               _p1.y = mouseY;
               _angle = Math.atan2(_p1.y - _p2.y,_p1.x - _p2.x);
               var rot:Number = (180 / Math.PI ) * _angle + 180;
               cos = Math.cos(_angle);
               sin = Math.sin(_angle);
               distance = Math.round(Point.distance(_p1,_p2)) + 1;
               while (--distance)
                    lineDrawing = new Line();
                    lineDrawing.x = _p2.x;
                    lineDrawing.y = _p2.y;
                    lineDrawing.rotation = rot;
                    _arrLine.push(_stage.addChild(lineDrawing));
                    lineDrawing = null;
                    _p2.x +=  cos;
                    _p2.y +=  sin;
               _p2.x = _p1.x;
               _p2.y = _p1.y;
Thanks

Answer 1

use:
package 
     import adobe.utils.ProductManager;
     import flash.display.DisplayObject;
     import flash.display.DisplayObjectContainer;
     import flash.display.MovieClip;
     import flash.display.Sprite;
     import flash.events.Event;
     import flash.events.MouseEvent;
     import flash.geom.Point;
      * @author Gadi G
     public class MouseHandler extends Sprite
          private  var _stage:DisplayObjectContainer;
          public var _bDraw:Boolean = false;
          private var _arrLine:Array = new Array();;
          private var _angle;
          private var _p1:Point =  new Point();
          private var _p2:Point = new Point();
          private var cos:Number;
          private var sin:Number;
          private var lineDrawing:Line;
          private var angle;
          private var distance:uint;
          private static var instance:MouseHandler;
          public var _mousePos:Point = new Point();
          public function MouseHandler()
          public static function getInstance():MouseHandler
               if (instance == null)
                    instance = new MouseHandler();
               return instance;
          public function startListening(prnt:DisplayObjectContainer)
               _stage = prnt;
               _stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
               _stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
          private function mouseDownHandler(e:MouseEvent):void
               _bDraw = true;
               _p2.x = mouseX;
               _p2.y = mouseY;
               _stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
               _stage.addEventListener(MouseEvent.MOUSE_MOVE, drawMouseLine);
          private function mouseUpHandler(e:MouseEvent):void
               _bDraw = false;
               _stage.removeEventListener(MouseEvent.MOUSE_MOVE, drawMouseLine);
          private function enterFrameHandler(e:Event):void
               for each (var i:int= _arrLine.length-1;i>=0;i--)
var s:Line=_arrLine[i];
                     s.scaleX = s.scaleY *=  .79;
                    // the lowest possile value is one twip which is 0.05
                    if (s.width < .7)
                         _arrLine.splice(_arrLine.indexOf(s), 1);
                         _stage.removeChild(s);
                         s = null;
               if (!_bDraw)
                    //_mousePos = null;
                    if (_arrLine.length == 0)
                         _stage.removeEventListener(Event.ENTER_FRAME, enterFrameHandler);
               _mousePos.x = mouseX;
               _mousePos.y = mouseY;
          private function drawMouseLine(e:MouseEvent):void
               _p1.x = mouseX;
               _p1.y = mouseY;
               _angle = Math.atan2(_p1.y - _p2.y,_p1.x - _p2.x);
               var rot:Number = (180 / Math.PI ) * _angle + 180;
               cos = Math.cos(_angle);
               sin = Math.sin(_angle);
               distance = Math.round(Point.distance(_p1,_p2)) + 1;
               while (--distance)
                    lineDrawing = new Line();
                    lineDrawing.x = _p2.x;
                    lineDrawing.y = _p2.y;
                    lineDrawing.rotation = rot;
_stage.addChild(lineDrawing)
                    _arrLine.push(lineDrawing);
                    lineDrawing = null;
                    _p2.x +=  cos;
                    _p2.y +=  sin;
               }                _p2.x = _p1.x;                _p2.y = _p1.y;           }      }   }
Thanks