Re: [whatwg/dom] Event delegation via EventListenerOptions (#215)

Interesting, I suppose we should ask @dgraham for feedback too then. It seems the main performance benefit listed in that repository is no longer having to create synthetic event wrappers, which is not directly related to delegation. But yeah, for large trees having to check all ancestor nodes in an event's path while iterating through an event's path to find delegate listeners is either going to be slow or require complicated data structures.

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