It's up to you. I intentionally kept moving parts to the minimum in my demo, but here's the real thing I was using behind the scenes: https://github.com/facebook/react/tree/master/packages/simpl.... So in that sense it's not global, you can create as many as you like and then isolate them (e.g. per subtree).

The `simple-cache-provider` is just a reference implementation though. It's somewhat naïve, e.g. it doesn't have invalidation strategy and just lets you replace the whole cache with a new one if you want to invalidate.

We'll publish more details on lower level API and how to write your own cache in the future.