[WIP] Proof of concept of batching updates

[gaearon]

This is a proof of concept of batching updates in <Provider>.
I’m not sure we want to get this in, but it can serve as a starting point.

Solves #292.

Remaining issues:

• Should this be opt-in?
• We need to verify this works with RN correctly.
• Currently it forces you to use react-dom if you don’t use react-native which is a bummer for other renderers.

[esamattis]

We need to verify this works with RN correctly.

I can verify that. I ported the test to for the real React Native environment it passes without manual unstable_batchedUpdates when using this branch.

Currently it forces you to use react-dom if you don’t use react-native which is a bummer for other renderers.

I see this as a blocker. Doing it as an opt-in would solve it but what would it look like?

Maybe?

<Provider store={store} updateBatcher={ReactDOM.unstable_batchedUpdates}>
  <MyApp />
<Provier>

But I do feel that users shouldn't have to care about this at all. This is pretty much just an implementation detail. It should just work.

[timdorr]

Superseded by #416