Add/remove EventListner Questions

Hi guys,

Is add/remove EventListner relatively fast ? Parts of my program require disabling user input, I was using a Boolean busyFlag but I think it’s more solid if I just remove the event listeners when busy, and add them again when not busy.

Also, what if I accidentally add two identical event listners, will the second call be ignored ? I don’t plan on it, I’m just wondering.

Thanks.