gistfile1.txt

var clickme = document.getElementById('clickme');
var started = false;
var profileName = "Profile 1";

clickme.onclick = function() {
  if (!started) {
    clickme.innerHTML = "Stop";
    started = true;
    console.profile(profileName);
    console.log("starting profile: " + profileName);
  }
  else {
    clickme.innerHTML = "Start";
    started = false;
    console.profileEnd(profileName);
    console.log("stopping profile: " + profileName);
  }
};