hook object functions and measure times

hook.js

//Simple prototype modifier to add console.time measure
// whenever a function is called.
//The hook will ignore any function starting with _ as treat
// as private.

Object.prototype.hookEvents = function (modifier) {
  var obj = this;
  var name, fn;

  for (name in obj) {
    fn = obj[name];
    //Ignore any private functions
    if (name.substring(0, 1) == '_')
      continue;
    if (typeof fn === 'function') {
      obj[name] = (function (name, fn) {
        var args = arguments;
        return function () {
          modifier.apply(this, args);
          console.time('Function ' + name);
          var result = fn.apply(this, arguments);
          console.timeEnd('Function ' + name);
          return result;
        }
      })(name, fn);
    }
  }
};