Use native Set and Map

[jehon]

What about using Set for subscriber list, and Map for key => ... ?

[BrodaNoel]

I'm not against it, just tell me about the benefits.

Considering that duix has a really small code, and super simple, I kind of ignore performance benefits. But, if there are are other benefits, I could consider it.

[BrodaNoel]

Here #5 someone already talked about adding Set and Map.

[jehon]

More than Set and Map, a WeakMap would be good to have a "weak" pointer to the element.
Or waiting for weakReferences to be supported everywhere?