Slice flush into small parts

[gaearon]

This is a proof of concept of slicing flush into small parts.
React DevTools currently heavily slow down big apps like (PE) with all the synchronous work.

Example before:

Example after:

[jaredly]

this is awesome. Does it get super behind though?

[gaearon]

In my testing it gets behind by a few seconds if you're doing heavy operations (e.g. unmount/mount a FixedDataTable multiple times without giving it time to breathe).

For React Motion-like demos with tons of fast updates, it gets behind by about half a second so it’s “trailing” updates at a slower speed.

It’s a bit hard for me to say if this is confusing or not unless we let people use this, and wait for complaints.

[gaearon]

This one seems dead, I couldn’t find calls to it anywhere.

[jaredly]

I'd love for there to be an indicator that we're lagging, to reduce confusion. maybe add a flag to "send-many" indicating how many evens we still have to send. Then in the UI we could show a loading indicator if that number gets above 100 or something.

That doesn't have to be part of this diff though

[gaearon]

I did some tweaks to better handle real world scenarios, now it’s consistent pretty fast even with large number of events so I think maybe we don’t need an indicator.