This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry.

A user uploaded a 106-page PDF and clicked "Ask this book".

The screen said "Preparing… 0/0".

It said that for an hour.

No errors. No failed requests. No exceptions in the logs. Just one graph I still think about: a CPU-only container, pinned at 390%. Almost exactly four cores, flat, like a ruler.