psi-v4

PageSpeed Insights with reporting

Run mobile and desktop performance tests for your deployed site using Google PageSpeed Insights v4.

Install

$ npm install psi-v4

Usage

const psi = require('psi-v4');

// Get the PageSpeed Insights report
psi('theverge.com').then(data => {
  console.log(data.ruleGroups.SPEED.score);
  console.log(data.pageStats);
});

// Output a formatted report to the terminal
psi.output('theverge.com').then(() => {
  console.log('done');
});

// Supply options to PSI and get back speed and usability scores
psi('theverge.com', {nokey: 'true', strategy: 'mobile'}).then(data => {
  console.log('Speed score:', data.ruleGroups.SPEED.score);
});

As of PSI 4.x, we expose the PageSpeed Insights speed score.

API

psi(url, [options])

Returns a Promise for the response data from Google PageSpeed Insights.

url

Type: string

URL of the page for which the PageSpeed Insights API should generate results.

options

Type: Objectplugin

key

Type: string
Default: Free tier

When using this module for a production-level build process, registering for an API key from the Google Developer Console is recommended.

strategy

Type: string
Default: mobile
Values: mobile desktop

Strategy to use when analyzing the page.

locale

Type: string
Default: en_US

Locale results should be generated in.

threshold

Type: number
Default: 70

Threshold score to pass the PageSpeed test. Useful for setting a performance budget.

psi.output(url, [options])

Output the formatted report to the terminal.

Returns a promise for the response data from Google PageSpeed Insights.

url and options is the same as psi().

CLI

$ npm install --global psi-v4

$ psi-v4 --help

  Usage
    $ psi-v4 <url>

  Options
    --key        Google API Key. By default the free tier is used
    --strategy   Strategy to use when analyzing the page: mobile|desktop
    --format     Output format: cli|json|tap
    --locale     Locale results should be generated in
    --threshold  Threshold score to pass the PageSpeed test
    --optimized  Get the URL of optimized resources
    --download   Download optimized resources

  Example
    $ psi-v4 todomvc.com --strategy=mobile

Getting PSI into your build process

A sample Gulp project using PSI is available, but this project written for PSI v2. You can fork it and rewrite for PSI v4.

If you use Grunt, grunt-pagespeed is a task by James Cryer that uses PSI v2 under the hood. You can fork it and rewrite to PSI v4 too.

For testing local project, we recommend using ngrok.

License

Apache-2.0 - Copyright 2015 Google Inc