trr_performance.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* eslint-env node */

const { logTest } = require("./utils/profiling");

module.exports = logTest(

  "dns lookup pageload",

  async function (context, commands) {

    context.log.info("Starting a pageload to measure DNS lookup time");

    const testType = `${context.options.browsertime.test_type}`;

    context.log.info("testType: " + testType);

    const url = "https://httpstat.us/";

    await commands.navigate("about:blank");

    // Idle to allow for confirmation

    await commands.wait.byTime(45000);

    if (testType === "trr_warm") {

      // Ensure the trr connection has been warmed up by making an arbitrary request

      await commands.navigate("https://www.w3.org");

      await commands.wait.byTime(2000);

    // Start measuring

    await commands.measure.start();

    await commands.navigate(url);

    await commands.measure.stop();

    let dns_lookup_time = await commands.js.run(`

      return (window.performance.timing.domainLookupEnd - window.performance.timing.domainLookupStart);

`);

    let connect_time = await commands.js.run(`

      return (window.performance.timing.connectEnd - window.performance.timing.navigationStart);

`);

    context.log.info("dns_lookup_time: " + dns_lookup_time);

    context.log.info("connect_time: " + connect_time);

    await commands.measure.addObject({

      custom_data: { dns_lookup_time, connect_time },

});

    context.log.info("DNS lookup test finished.");

    return true;

);