Chrome Dev Tools Utilities

Snippets.js

// Paste these into the Developer Tools Console

// Calculate DNS lookup time in milliseconds
var pageNavArr = performance.getEntriesByType("navigation");
var pageResArr = performance.getEntriesByType("resource");
var pageArr = pageNavArr.concat(pageResArr);
pageArr.forEach(function(element) {
    var dnsTime = element.domainLookupEnd - element.domainLookupStart;
        if (dnsTime > 0) { // Don't display cached DNS entries
            console.log(element.name);
            console.log(dnsTime);
        }
});

// Calculate SSL handshake time in milliseconds - needs work
var pageNavArr = performance.getEntriesByType("navigation");
var pageResArr = performance.getEntriesByType("resource");
var pageArr = pageNavArr.concat(pageResArr);
pageArr.forEach(function(element) {
    var sslTime = element.connectEnd - element.secureConnectionStart;
        if (sslTime > 0) {
            console.log(element.name);
            console.log(sslTime);
        }
});