Best practices for firestore streams

[greenc0102]

Hi there,

I'm working with firebase Firestore on a flutter web and mobile application. It's great to work with but I just want to make sure I'm implementing everything correctly early in development to avoid issues down the line.

For context my application has users receiving a schedule from Firestore. This schedule is set and can be modified from an admin dashboard. The schedule is displayed on cards with data from a streambuilder. Each schedule item is stored as a document in a single collection, and linked to the user by their UID.

So is it most effective for me to do

1. Wrap my entire schedule list in one streamBuilder that will listen for any changes and update accordingly
2. Wrap each individual schedule item in its own streamBuilder that listens for changes on only itself.
3. Go even further and utilise stream.map so that only the actual widget that needs to be changed will rebuild.

It is important that the app updates in real-time and doesn't require the user to refresh in order to get data, but with that said I want to be as efficient as I can be with keeping reads and writes down. I'm not sure how smart Firestore is (if I used option 1 for instance, would a change in one schedule item result in additional reads from every other schedule item document)

Thanks for any help in advance. Don't need any code snippets etc, just looking for the best option