Exclude low level events from re-dispatch

[tegefaulkes]

Specification

Events such as the EventQuicStreamSend and EventQuicConnectionSend and any other very low level events needs to be excluded from re-dispatch.

Currently events bubble upwards through re-dispatching at every level . A QUICStream event will be created in QUICStream and then cloned and dispatched in the QUICConnection, QuicClient, QuicServer, and in Polykey through the NodeConnection and NodeConnectionManager. As a result a QUICStream event can be cloned 4-ish times. This will be a severe performance hit for send events which are dispatched for every packet.

To solve this, we need to special case and exclude these events from re-dispatch inside the QUICConnection for the EventQuicStreamSend and inside the QUICSocket for the EventQUICConnectionSend event.

Additional context

Tasks

1. Exclude all send events from being re-dispatched further than they're needed.
2. Review and do the same for any event that happens often through normal usage. 'Once' events can be ignored here.

[CMCDragonkai]

@amydevs this is a performance issue. You want to be aware of this when listening for events, or when you are dispatching events.

[tegefaulkes]

This has been addressed by commit 82e4a43.

[CMCDragonkai]

All of the above event names should be QUIC not Quic, I think they were typos.

[CMCDragonkai]

In summary:

• JS event target events cannot be redispatched, they have to be cloned and emitted again - this adds alot of work for deeply encapsulated objects.
• We are selectively deciding which events are re-dispatched, and which events are fully encapsulated, and which events are transformed/chained. It's kind of like exceptions catching. We have this same set of operations here too.

This is not a choice that can be done in js-events, this is context dependent on the user.

The same choices occur with observable reactive properties later.