400+ms overhead anytime rails accesses current_user

my apps views are taking anywhere from 800-2000m开发者_StackOverflow社区s to load according to the logs.

I noticed for a page w/o accessing current_user the time is under 10ms... Anytime current_user is accessed it takes 400ms just to get current_user.

Any ideas why it is taking so long to get the current_user? Any way to track down where the lag is in performance?

Thanks

---

The logs should show you the database times as well as the render times. See if they track. i.e. high render times always implies a high database time.

There are various ways to profile rails if it is not a database issue.

The Railscasts #98 Request Profiling episode is old but it is a sample of what Rails has already built in for such questions.