Eu sei que as perguntas do profiler podem ser bastante gerais, mas aqui tenho uma pergunta e um exemplo muito específico.

Eu sei que no código a seguir (tirado deA pergunta de Josué), que um número infinito decírculo instâncias de objeto estão sendo adicionadas aohostComponent. Obviamente, isso causa lentidão gradual no aplicativo.

Minha pergunta é: quando executo o Flash Builder Profiler, onde exatamente vejo onde está o problema?

Exemplo em execução do aplicativo

Para experimentar, crie um novo projeto Flex 4 e cole neste código:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
               initialize="onInit()" viewSourceURL="srcview/index.html">
    <fx:Script>
        <![CDATA[
            import mx.core.UIComponent;
            import mx.effects.Fade;         
            import spark.effects.Move;

            private var hostComponent:UIComponent;

            private function onInit():void{

                hostComponent = new UIComponent();
                hostComponent.id = "circleHostComponent";
            }

            /* Add circle UIComponent objects to the hostComponent.
                Move and Fade the circle objects */
            private function onTimerEvent(event:TimerEvent):void{  

                var yPos:Number = Math.ceil(Math.random()*100);
                var radius:Number = Math.ceil(Math.random()*5); //1-12
                var effectAlpha:Number = Math.random()*0.5 + 0.2 // 0-1
                var effectDuration:Number = Math.ceil(Math.random()*3000) + 1000;

                var circle:UIComponent = new UIComponent();
                circle.graphics.beginFill(0x1C75BC, effectAlpha);
                circle.graphics.drawCircle(90, yPos, radius);
                circle.graphics.endFill();

                hostComponent.addChild(circle);

                var moveEffect:Move= new Move(circle);
                moveEffect.xBy = 300;
                moveEffect.duration = effectDuration;

                moveEffect.play(); 

                var fadeEffect:Fade = new Fade(circle);
                fadeEffect.alphaFrom = 1;
                fadeEffect.alphaTo = 0;
                fadeEffect.duration = effectDuration;

                fadeEffect.play();

                this.addElement(hostComponent);

            }

            private function onClick():void{
                startButton.enabled = false;
                var t:Timer = new Timer(100, 0);
                t.start();
                t.addEventListener(TimerEvent.TIMER, onTimerEvent);

            }       

        ]]>
    </fx:Script>

    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>

    <s:Button id="startButton" label="Click to Start" click="onClick()" />
</s:Application>