highfidelity/hifi — pull request #2951 by ZappoMan (2014-05-29 19:14:12+00:00)
Title: add improved detailed rendering and FPS debugging stats

* adds a new easy to use PerformanceTimer class, which will allow the tracking of categorized performance timers.
* adds debug menu items to enable display of performance timing details for rendering, updating, paintGL, and other things that impact our overall FPS