title: Dynamically loading images in Safari on iPad 2 causes memory leak
body: <p>I'm developing a game on HTML5 and it has a memory leak problem when running on iPad 2. In the memory trace, I see loaded images occupied almost used memory and it's never released. </p>
  
  <p>So, It's reason why I want to know extractly: how does browser keep images on memory?</p>
  
  <p>In my imagination, the cycle begins when HTML parser of browser reach an Image DOM element, it loads the image data from URL into memory and render it to screen. </p>
  
  <p>So, when is the image data released from memory? Or how to release it manually?</p>