pingHttps.js

const pingHttps = function(limit) {
    let totalTimes = -1;
    const myPingData = [];
    const analyzeData = function (inputDataArr) {
        console.log('Raw Ping Data:');
        console.log(myPingData);
        var roundTripTimeArr = inputDataArr.map(x => x.end - x.begin);
        var avgRoundTripTime = roundTripTimeArr.reduce((a, b) => a + b) / roundTripTimeArr.length;
        console.log(`Tested ${roundTripTimeArr.length} times. Average round trip time: ${avgRoundTripTime} ms.`);
    };
    const microPing = function (limit) {
        totalTimes += 1;
        var currentSeq = totalTimes + 0;
        var xhr = new XMLHttpRequest();
        xhr.open('GET', location.href + '?t=' + Date.now());
        xhr.onload = (function (currentSeq) {
            return function () {
                myPingData[currentSeq].end = Date.now();
                if (totalTimes < limit - 1) {
                    microPing(limit);
                } else {
                    analyzeData(myPingData);
                };
            };
        })(currentSeq);
        xhr.send();
        myPingData[currentSeq] = {
            begin: Date.now()
        };
    };
    microPing(limit);
};

pingHttps(10);