Animating a PNG file in flash CPU
===

I have a PNG file 1024 x 768. On top of that I have other smaller PNG files that "slide in" (only moving along the x and y) via an ENTER_FRAME handler?

I was just wondering, do animating PNGS require more CPU than say, basic vector shapes? Is there anything I could do to optimize my animation?

It's literally like:

    private function onEnterFrame(e:Event):void {
      myPng.x += speed; // and so on
    }

