Is dispatchEvent slower than code in class?

Hi guys,

Does dispatchEvent use any extra memory/cpu/anything compared to calling a normal function?

I plan to call it every couple of milliseconds for a timer.

Many thanks!

Yes there is slightly more overhead than using a callback. dispatchEvent requires you to instantiate an event object (which is the most expensive part) and then loop over listener lists to find an object registered for that event. A callback simply triggers a function already resident in memory.

Events are still great for decoupling your code but callbacks are a nice way to optimize. Keep in mind that unless you're app is a game or game like, you may not notice a difference.

You may also be able to keep a pool of Event objects in the dispatching instance to re-use rather than create new ones for every dispatch.