How dispatchEvent() effects Performance?

programming flash
1

My question is more like “How dispatching custom event effects performance, if there is no listeners for these events?”

For example i have the following function:

public function checkSomething():void{
if(someBolean){
    doSpecificSomething1();
    dispatchEvent(new CustomEvent(target, CustomEvent.GENERAL_EVENT);
    dispatchEvent(new CustomEvent(target, CustomEvent.SPECIFIC_EVENT_1);
  }
if(someOtherBolean){
    doSpecificSomething2()
    dispatchEvent(new CustomEvent(target, CustomEvent.GENERAL_EVENT);
    dispatchEvent(new CustomEvent(target, CustomEvent.SPECIFIC_EVENT_2);
  }
}

So my question is how dispatching this events will effect performance, and should i refrain from dispatching more then 1 event. The question is relevant for both cases of the dispatched event been listened to or not.

Thanks in advance
Regards Thovas