// Interface for profiler

var Profiler = {

start: function(id) {},

stop: function(id) {},

getProfile: function(id) {}

};

// Implementation of profiler for time.

var ProfileTime = function() { this.profiles = {}; }; // Implementation specific constructor

ProfileTime.prototype = Object.create(Profiler); // Implement interface

ProfileTime.prototype.start = function(id) {

this.profiles[id] = new Date().getTimestamp();

};

ProfileTime.stop = function(id) { /* ... */ };

ProfileTime.getProfile = function(id) { /* ... */ };