flash cs5.5 - sharedObject

Hi, Nice to meet you, would you mind to answer me, how

performance made by 5.5 vs 5 on iPhone? especailly on graphic display,

bocz I want to upgrade but 5.5. trial version can deploy to iphone... please help!!

CS5 to CS5.5 you probably change Air 2.5 to Air 2.6, so it's probably not exactly the same code.

Well, SharedObject should be ok... ... so it's maybe the write permissions ?

Here a exemple by me:

package {
        import flash.desktop.NativeApplication;
        import flash.display.Sprite;
        import flash.display.StageAlign;
        import flash.display.StageScaleMode;
        import flash.events.Event;
        import flash.events.TouchEvent;
        import flash.geom.Matrix;
        import flash.net.SharedObject;
        import flash.sensors.Accelerometer;
        import flash.text.TextField;
        import flash.text.TextFieldType;
        import flash.ui.Multitouch;
        import flash.ui.MultitouchInputMode;

    public class Main extends Sprite {
           
            private static var _tf:TextField;
       
            public final function Main(){
                    stage.scaleMode = StageScaleMode.NO_SCALE;
                    stage.align = StageAlign.TOP_LEFT;
                   
                    _tf = new TextField();
                    _tf.text = "Hello World";
                    _tf.width = 480;
                    _tf.height = 800;
                    _tf.multiline = true;
                    _tf.selectable = true;
                    _tf.type = TextFieldType.INPUT;
                   
                    addChild(_tf);
                   
                    load();
                   
                    NativeApplication.nativeApplication.addEventListener(Event.DEACTIVATE, save);
                   
                    Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
            }
           
            public final function load():void {
                // Get the shared object.
                var so:SharedObject = SharedObject.getLocal("HelloWorld");
               
                if(so.data["tf"] != null){
                    _tf.text = so.data["tf"];
                }
            }
           
            public final function save(e:Event):void {
                // Get the shared object.
                var so:SharedObject = SharedObject.getLocal("HelloWorld");
               
                so.data["tf"] = _tf.text;
               
                so.flush();
            }
               
    }
}

Whether shared objects are working in Iphone?