.mousemove and memory, do I need to optimize this or not?
<p>I've created a simple demo of a light-test-thing here: <a href="http://jsfiddle.net/CGr9d/">http://jsfiddle.net/CGr9d/</a></p>

<p>When I record the memory usage using the Chrome dev tools I get this: <a href="http://cl.ly/LSDl">http://cl.ly/LSDl</a>, it basically go up until a certain point and then go down again and start over until it reaches the previous high point again.</p>

<p>is this normal/OK? 
Is there any way to optimize my code to make it less memory intensive?</p>

<p>This is my mousemove function:</p>

<pre><code>$('body').mousemove(function(e) {
  //2000 is half the image width/height, of course used for centering
  $('.light-circle').css({ backgroundPosition: (e.pageX-2000)+'px '+(e.pageY-2000)+'px' });
});
</code></pre>

<p>Thanks.</p>
