Slowdown in JavaScript game on a laptop

Slowdown in JavaScript game on a laptop

I wrote a game in JavaScript/jQuery that uses a timer to update the character periodically. It works fine in a browser but when I run it in Ogre (via the Awesomium plug-in) there is a significant slow-down, although it still runs acceptably fast on my workstation. However, when run on a laptop with lower specs, it runs very slowly, it is not even playable.

Here is the relevant code:

      This is the main game file that starts the timer and calls the Update function of the main character:

  2. const TIMER_INTERVAL = 0.001;

  4. // Start the game
  5. var newBiology = new Game("newBiology", TIMER_INTERVAL);

  7. function Game(varName, interval)
  8. {
  9. this.update = function()
  10. {
  11. // Update the bee. 
  12. myBee.update(this.mUpdateInterval);
  13. }

  15. setInterval(varName + ".update()", TIMER_INTERVAL * 1000);
  16. this.mUpdateInterval = interval;
  17. }

And this is the main character's class:

  2. function Bee(node)
  3. {
  4.       this.Node = node;
  5.       
  6.       this.moveLeft = function()
  7. {
  8.    _x -= _speed;
  9.    _parent.css({ "left": _x + "px" });
  10. }

  12.       
  13.       this.moveRight = function()
  14. {
  15.    _x += _speed;
  16.    _parent.css({ "left": _x + "px" });
  17. }

  19.       
  20. this.update = function(timeSinceLastCall)
  21. {
  22.    if (_moveLeft)
  23.    {
  24.        this.moveLeft();
  25.    } // End if
  26.    else if (_moveRight)
  27.    {
  28.        this.moveRight();
  29.    } // End else if
  30.    else if (_moveDown)
  31.    {
  32.        this.moveDown();
  33.    } // End else if
  34.    else if (_moveUp)
  35.    {
  36.        this.moveUp();
  37.    } // End else if
  38. }

Anybody have any ideas why it would be so slow on a laptop with lower specs?