Count number of milliseconds to reach desired "page complete" condition

quickPageLoadCounter

var counter = setInterval(timer, 1);
var count = 0;
function timer() {
    count++;
    var ele = document.getElementById("thisdiv");
    if (ele.className.indexOf('ng-hide') !== -1) {
        clearInterval(counter);
        console.log(count, count / 1000);
        setTimeout(function() {
            window.location.reload(true);
        },5000);
    }
}