Handled under the hood by Next 13. To be honest, they probably could have done something to make that a bit more obvious when looking at the code - it probably wouldn't hurt to throw in a simple 'cache' keyword or something.

This is the documentation I could find although it's not for 13 but Beta: https://beta.nextjs.org/docs/data-fetching/caching

They say there's a new `cache` function in React and they have patched `fetch` to use it by default (for GET requests).

Does this include a solution to the N+1 queries issue (container element requests a list of items, then item elements each request their details)? I see you can do pre-fetching, perhaps those can be batched.

EDIT: Found an example that uses DataLoader by "caching the cache". The src/api.ts module exports a cached DataLoader for characters, and src/components/CharacterAvatar.tsx imports and calls it during render simply like this:

  const character = await characters().load(id);

https://github.com/AndrewIngram/next-rick-morty