Comment 9 for bug 982938

DBM is roughly equivalent to querying in realtime (in that we wouldn't need an a-priori listing of all users), but harder (because we would need a message passing system to keep it up to date). We can just query a fast webservice, I suspect, with a small cache. We've done this before.

@noodles Loading all the PPA tokens into memory isn't an issue, because a single run only ever updates a few minutes worth of PPAs. That said, having N queries per archive is fine, so your branch isn't a problem (even though it increases query count).

The current driver for exceptional times is the late evaluation of person, which I have fixed in the attached branch. We should see how that runs and then investigate further if needed.