Finding out CPU-intensive methods


Is there a good way to try and identify CPU intensive methods? If I look at my Galaxy graphs I see the following:

It kinda drives me nuts. 23% is basically 1 full CPU, and it seems to happen quite regularly. There are ~140 active connections to the site as of this screenshot.

If I look at Kadira, I see very few clues. I’ve tried to sort by “Compute Time” under the methods section, but nothing seems like an obvious culprit.