loadCounter

var fired = Date.now();
var timeoutPeriod = 1000;
var maxDelay = 2000;
var overloaded = false;

setTimeout(function() {
    var actuallyFired = Date.now();
    var delay = actuallyFired - (fired + timeoutPeriod);
    if (delay > maxDelay) {
        overloaded = true;
    }
}, timeoutPeriod);