[throwaway3157]

> When I've used to Amazon Go store,

My receipt was in the app shortly after (I walked about two blocks and checked). I think it took longer for an email to show up, but can't recall exactly

[grandmczeb]

My experience had been that it can vary quite a bit. Most of the time it’s pretty quick, but occasionally it can be over an hour.

[sgc]

Maybe that is a person verifying because the software flagged something as uncertain.

[dodobirdlord]

More likely, there's a work queue and sometimes it gets a bit backed up or falls a little behind while autoscaling resources kick in. Having fully dedicated capacity for something that's handled asynchronously, fluctuates with time, and can tolerate many minutes of processing delay would be a waste of money.

[sgc]

It's Amazon, to me it seems more likely they are tuning their ML with human input than they somehow need an hour to spin up AWS for their shiny new baby.

[grandmczeb]

Very possible.

[hamandcheese]

Maybe they use spot instances for all the compute.