Scroll performance is low on iPad 4

[VladimirCores]

I got a screen with a lot of LevelItemRenderer on it, with the same number of components in it (as a LevelsTemplate from examples) and when i scroll them performance drop down very significant to about 15 fps or even lower. How can i improve that?

[rzarich]

1. How many item renderers do you have?
2. How many draw calls are during scrolling?
3. What elements are in the item renderer?

[VladimirCores]

Here is a screenshot from desktop
http://oi61.tinypic.com/2vl2o1s.jpg

    public function LevelItemRenderer(itemSize:Number)
    {
        super();

        touchableWhereTransparent = true;

        var textures:MenuTextures = new MenuTextures();

        _background = new Image(textures.levelBackground);
        _button = new Button(textures.levelBackground);

        addElement(_background, $width(itemSize).rcpx, $height(itemSize).rcpx);
        addElement(_button, $width(itemSize).rcpx, $height(itemSize).rcpx);

        var sx:Number = _button.scaleX;
        var sy:Number = _button.scaleY;

        // Level lock
        _levelLock = new Image(textures.levelLock);
        _levelLock.scaleX = sx;
        _levelLock.scaleY = sy;
        addElement(_levelLock, $vCenter(0).rcpx, $hCenter(0));

        flatten();
    }