What is the recommended way to observe very large lists

[17Amir17]

Lets say I have a very large comment list (around 5-10k comments). I want an infinite list that contains all comments, and updates the comments if some of them change or a comment is added/deleted.

I have two components:
CommentsList - FlatList that contains all comments
CommentItem - Comment component that observes a single comment

The simplest solution

The simplest solution is to wrap CommentsList with an observer observing all comments, then whenever a comment is added/deleted, we update the comments list with the correct comments. This would work but since we have a very large amount of comments this would be slow.

Paginate without observer

Instead of wrapping CommentsLists with an observer, we add a state of loaded comments, and each time we reach the end of the list, we query with skip and take and append the result to the comments state. This will query much faster, but means that list might not always be updated in the case of a comment being deleted or added after we queried it.