KissMetrics performance regression

Release: [on New Relic](https://rpm.newrelic.com/accounts/350429/applications/2137721/deployments/1689398#tab-view_deployment=change_log)

![screen shot 2014-08-05 at 19 01 29](https://cloud.githubusercontent.com/assets/360800/3815204/472ebe8e-1cc2-11e4-8ac4-feb106eae06b.png)

@kris-lab fyi