Adobe Air Desktop memory usage.

The basic idea, create a class with this: (let's call it TrackWeakObjects)

static public var instanceKeys:Dictionary = new Dictionary(true);

Each time you create an object in your code (can even do it in a constructor) add it to the dictionary:

var sprite:Sprite = new Sprite();

TrackWeakObjects.instanceKeys[sprite] = true;

Now you can count how many object you create and how many get removed:

public static function count():uint

{

    var count:uint;

    for(var i:* in instanceKeys)

    {

         count++;

    }

   return count;

}

trace the "count" every 10 seconds. If you cleanup correctly your objects then this "count" should stay steady and not grow too much, if you don't then this count will keep increasing as you keep using the app. That's the basic idea, you can come up with a more complex system that tracks class instances, etc.