codahale/metrics — pull request #148 by chids (2012-01-26 10:03:57+00:00)
Title: Add slow callback support in TimerMetric that supports:

- Timeout: callback is invoked if the timed method doesn't
return within the given time
- Percentile: callback is invoked if the timed method doesn't return
within the given percentile value of the Timer

This closes #39