"use cache" in Canary to support custom keys

[daveycodez]

Goals

I noticed that unlike unstable_cache, "use cache" doesn't allow you to set your custom keys.

What if I want to have 2 separate functions that share the same cache key? I might have pre-cached data I want to load into the cache in order to skip a database request, for example:

/posts page loads all posts.

I want to loop through each post and pre-fill the cache for /post/post_id with each post JSON object from this parent object, so when the prefetches to each /post/post_id fire off, they don't request by database and instead use the cache key I have preloaded with data.

Background

unstable_cache vs use cache

Proposal

Please support setting cache keys for "use cache" or do not deprecate unstable_cache so we can continue to use it that way in future releases