Variable value differ while tracing it.

Question

Hi, I am having a really annoying problem with my mobile air project.
I have variable that value is updated every enterFrame (gyroscope roll value) and every thing is ok when I trace it like:
private function update(event:EnterFrame):void
     trace(roll);
     _onUpdate(roll);
but when I remove "trace(roll)" line my value seems to to contain some really random data, once it is refreshed other time it is not. Can anybody tell me what is going on ? how trace statement can do anything ?

Answer 1

It's not an answer for the topic question (why trace call was doing anything with traced variable using gyroscope ane) but i got my code working.
here is the class that works ok. It seems that setting interval to accelerometer cause some problems with delaying data. without setting interval (letting it be default set by device, according to adobe api doc) everything is ok. didn't tryied it with gyroscope ane but maybe there is the same problem.
Conclusion: do not use setRequestedUpdateInterval() method. As it is described in api doc it should set update interval not delay
private var _onUpdate:Function;
  private var acc:Accelerometer = new Accelerometer();;
  public function GyroscopeStering()
  public function Start(onUpdate:Function):void
  _onUpdate = onUpdate;
  if(Accelerometer.isSupported && !acc.muted)
  acc.addEventListener(AccelerometerEvent.UPDATE, accUpdate);
  StarlingView.Instance.addOnUpdateListener(update);
  NativeApplication.nativeApplication.systemIdleMode = SystemIdleMode.KEEP_AWAKE;
  public function Stop():void
  acc.removeEventListener(AccelerometerEvent.UPDATE, accUpdate);
  StarlingView.Instance.removeOnUpdateListener(update);
  NativeApplication.nativeApplication.systemIdleMode = SystemIdleMode.NORMAL;
  private static const rollMultipler:Number = 1.5;
  private var _roll:Number = 0;
  protected function accUpdate(event:AccelerometerEvent):void
  if(Core.STAGE.orientation == StageOrientation.UPSIDE_DOWN)
  _roll = -event.accelerationX * rollMultipler;
  else
  _roll = event.accelerationX * rollMultipler;
  private function update(dl:Number):void
  _onUpdate(_roll * dl);