Profiling PHP Part 1: Intro to Xhprof & Xhgui
Profiling is measuring the relative performance of your application at the code-level - like CPU usage, memory usage, time and number of calls per function
19 Aug 2014 ... Xhprof was created by Facebook, and includes a basic UI for reviewing ... PHP 5.3+; ext/mongo; composer; mongodb (optional for collection, ...