benchmark html page render - javascript

wait.js

var start = Date.now();
$.ajax({
  method: 'GET',
  url: 'someurl'
})
.done(function () {
  $someElement.html('<div id="results"></div>');
  console.log("done",  Date.now() - start);
})
.fail(function () {
  $someElement.html('<div id="results"></div>');
  console.log("fail",  Date.now() - start);
});
function waitForRender() {
  if (!$("#results").size()) {
    window.requestAnimationFrame(waitForRender);
  } else {
    console.log("rendered", Date.now() - start);
  }
}
waitForRender();