Switch to using eventstreams

[yuvipanda]

Eventstreams are a much better fit for this than polling via HTTP requests as we do now. We should switch to it (plus a polyfill for IE users)

[krinsman]

Is using Prometheus+psutil a good enough compromise to using event streams?

That is what I am trying to implement lately (a standard "interface" for Prometheus to track any suitable psutil metric that the user specifies in config). I have no idea either way whether that's performant or not though.

[jtpio]

I think this refers to using an EventSource on the frontend instead of polling via HTTP requests?

With the nbresuse backend emitting the events.