Collections and rendering

[maxkrieger]

If I use useFirestoreCollectionData in a top level component to render a list of many items, how over-zealous will react be about rendering? I learned about this general pitfall of high level state while watching the Recoil demo talk.

Ideally, a single item component re-renders on update, but not the whole list. Is there a way to only grab, say, the IDs of a collection and not re-render if there are doc updates to that collection? Is useMemo the only way? EDIT: I assume useFirestoreCollection is what I actually want, and the snapshot only changes when keys are added/removed. Just looking for confirmation now!

Might be a good addition to the docs to note this difference between useFirestoreX and useFirestoreXData