> Cloudflare workers don't run in the background. They block the HTTP request. For serious computation, Cloudflare should offer background workers that can run for extended periods of time.

You can use `event.waitUntil()` to schedule a task that runs after the HTTP response has completed, and you can use cron triggers to schedule background work in the absence of any HTTP request at all. You can even build a reliable async queuing system on top of cron triggers and Durable Objects, though at the moment it's a bit DIY -- we're working on improving that.