XHR Stresstest

stresstest.js

    var change = 0;
    var simultanius = 0;
    var que = 1000; // number of tests

    Array(que).join(0).split(0).forEach(function(a,i){
        var xhr = new XMLHttpRequest;

        xhr.open("GET",'/?' + i); // cacheBust
        xhr.onreadystatechange = function() {
            if(xhr.readyState == 2){
                change++;
                simultanius = Math.max(simultanius, change);
            }
            if(xhr.readyState == 4){
                change--;
                que--;
                if(!que){
                    console.log(simultanius);
                }
            }
        };
        xhr.send();
    });