[deckard1]

Doesn't Cloudflare have a cache API and/or cache fetch calls for workers?

A number of people are talking about Lambda or loading files, SQLite, etc. These aren't likely to work on CF. CF uses isolated JavaScript sandboxes. You're not guaranteed to have two workers accessing the same memory space.

This is, in general, the problem with serverless. The model of computing is proprietary and very much about the fine print details.

edit: CF just announced their SQLite worker service/API today: https://blog.cloudflare.com/introducing-d1/