This is mostly a note for myself, but maybe other contributors will have some thoughts on this.

Some current bugs we have:

• requesting data for more than two weeks usually times out
• the last day of data always has nothing for some reason (probably a weird time issue)

The main issue is that there's a lot of loops being used to organize the data over time (see analytics_service.rb#stats_grouped_by_day). We can probably solve the time out issue by caching the data somehow, but I'm not sure how to do that.