Doesn't seem to be mentioned in the page but if you're talking about request caching there's libraries like PlugHTTPCache or RequestCache.

Otherwise I usually use Nebulex (annotations are nice for Ecto queries) with ETS as it's faster than with Redis (if you don't care about losing the cache on deployment).

There's options, what do you want to cache? One thing to keep in mind is that with LiveView, there is a live process on the server side while the websocket remains connected.

That means that many small things, like fetching user permissions, do not need to be performed again on every single request like a more tradition SPA application would require. Instead you can perform them once when the user connects and then simple store them in the LiveView process. That process can also subscribe to PubSub notifications for changes, which provides a cache invalidation method.

Effectively, a LiveView process functions as a tiny dedicated cache for any given connected user.

Out of the box in Elixir/Erlang, Phoenix is the web framework layer.