Benchmarking serial vs parallel Promise executions

benchmark.js

'use strict';

const http = require('http');

const getQuote = () =>
  new Promise((resolve, reject) => {
    http.get('http://ron-swanson-quotes.herokuapp.com/v2/quotes', res => {
      res.setEncoding('utf8');

      let data = '';

      res.on('data', chunk => {
        data += chunk;
      });

      res.on('end', () => {
        resolve(data);
      });

      res.on('error', e => {
        reject(e);
      });
    });
  });

(async () => {
  console.time('Serial requests');
  await getQuote();
  await getQuote();
  await getQuote();
  await getQuote();
  await getQuote();
  console.timeEnd('Serial requests');

  console.time('Parallel requests');
  await Promise.all([
    getQuote(),
    getQuote(),
    getQuote(),
    getQuote(),
    getQuote(),
  ])
  console.timeEnd('Parallel requests');
})();