Rails - Completed time for a request significantly higher than View and DB times

Question

I have a controller that returns JSON or XML from a fairly complex relational query with some controller logic as well.

I\'ve tuned on the DB side by refining my query a

Answer 1

Your DB number is time actually spent in the database, but not loading ActiveRecord objects.

So if you're loading 168,000 ruby active_record objects to render then as JSON, this would explain your 550 ms (or more!)