URL-speed-test.js

const puppeteer = require('puppeteer');
let browser = puppeteer.launch({
  args: ['--no-sandbox', '--disable-setuid-sandbox'],
});
async function test(url) {
  browser = await browser;
  const page = await browser.newPage();

  const a = Date.now();
  await page.goto(url, {
    timeout: 60000,
  });
  await page.waitForSelector('#root', { timeout: 10000 });
  console.log(Date.now() - a);

  return Date.now() - a;
}

(async function go() {
  const results = [];
  for (let i = 0; i < 10; i++) {
    const res = await test('https://new.codesandbox.io');
    results.push(res);
  }
  browser.close();

  const total = results.reduce((p, n) => p + n, 0);
  const avg = total / results.length;

  console.log('AVG: ' + avg);
})();