Webpage performance testing with nightmare.js

nightmare.js

let Nightmare = require('nightmare');
let harPlugin = require('nightmare-har-plugin');
let options = {
  waitTimeout: 1000
};

harPlugin.install(Nightmare);

let nightmare = Nightmare(Object.assign(harPlugin.getDevtoolsOptions(), options));

// expects URL passed in as arg
let url = process.argv[2];
if (!url) {
    process.exit(1);
}

nightmare
    .viewport(1024, 768)
    .waitForDevtools()
    .goto(url)
    .wait('body')
    .getHAR()
    .end()
    .then((result) => {
        let onLoad = result.pages[0].pageTimings.onLoad;
        console.log(onLoad);
     });

package.json

{
  "name": "performance-testing-nightmare",
  "version": "1.0.0",
  "description": "browser perfromance test validation",
  "dependencies": {
    "nightmare": "^2.9.0",
    "nightmare-har-plugin": "^0.9.0"
  }
}

runtest.sh

#!/bin/bash
for run in {1..40}
do
  baseline=$(node nightmare.js 'http://www.nytimes.com/2016/test-page-1.html')
  secondary=$(node nightmare.js 'http://www.nytimes.com/2016/test-page-2.html')
  echo $baseline, $secondary
done

Really cool! I forked it on this repository. For some reason the loop structure was failing to my 4.3 bash, btw.