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https://github.com/paulirish/pwmetrics

Progressive web metrics at your fingertipz
https://github.com/paulirish/pwmetrics

lighthouse metrics performance webperf

Last synced: about 2 months ago
JSON representation

Progressive web metrics at your fingertipz

Host: GitHub
URL: https://github.com/paulirish/pwmetrics
Owner: paulirish
License: apache-2.0
Created: 2016-08-24T04:22:43.000Z (about 8 years ago)
Default Branch: master
Last Pushed: 2022-12-09T08:05:31.000Z (almost 2 years ago)
Last Synced: 2024-04-17T04:29:28.881Z (5 months ago)
Topics: lighthouse, metrics, performance, webperf
Language: TypeScript
Homepage:
Size: 1.39 MB
Stars: 1,246
Watchers: 29
Forks: 74
Open Issues: 40
Metadata Files:
- Readme: readme.md
- License: LICENSE

Awesome Lists containing this project

Front-End-Performance-Checklist - PWMetrics - CLI tool and lib to gather performance metrics
awesome-coding - pwmetrics

README

# Deprecated

In favour of better support and many cool features of:
- [Lighthouse CI](https://github.com/GoogleChrome/lighthouse-ci) - is a suite of tools that make continuously running, saving, retrieving, and asserting against Lighthouse results as easy as possible.
- [Lighthouse CI Action](https://github.com/treosh/lighthouse-ci-action) - action integrates Lighthouse CI with Github Actions environment. Making it simple to see failed tests, upload results, run jobs in parallel, store secrets, and interpolate env variables.
- [Treo.sh](https://treo.sh) - Page speed monitoring made simple.

PWMetrics

Progressive web metrics

Progressive web metrics at your fingertipz. 💅

CLI tool and lib to gather performance metrics via Lighthouse.

![image](https://cloud.githubusercontent.com/assets/39191/19417867/7aead922-93af-11e6-88ec-917dad6e89d2.png)

Documentation on these metrics in the works. If you hit bugs in the metrics collection, report at [Lighthouse issues](https://github.com/GoogleChrome/lighthouse/issues).
[How to use article](https://medium.com/@denar90/easy-progressive-web-metrics-9afa5ed857c2)

### Install [![NPM pwmetrics package](https://img.shields.io/npm/v/pwmetrics.svg)](https://npmjs.org/package/pwmetrics)
```sh
$ yarn global add pwmetrics
# or
$ yarn add --dev pwmetrics
```

### CLI Usage

```sh
$ pwmetrics

pwmetrics http://example.com/

# --runs=n Does n runs (eg. 3, 5), and reports the median run's numbers.
# Median run selected by run with the median TTI.
pwmetrics http://example.com/ --runs=3

# --json Reports json details to stdout.
pwmetrics http://example.com/ --json

# returns...
# {runs: [{
# "timings": [
# {
# "name": "First Contentful Paint",
# "value": 289.642
# },
# {
# "name": "Largest Contentful Paint",
# "value": 292
# },
# ...

# --output-path File path to save results.
pwmetrics http://example.com/ --output-path='pathToFile/file.json'

# --config Provide configuration (defaults to `package.json`). See _Defining config_ below.
pwmetrics --config=pwmetrics-config.js

# --submit Submit results to Google Sheets. See _Defining submit_ below.
pwmetrics --submit

# --upload Upload Lighthouse traces to Google Drive. See _Defining upload_ below.
pwmetrics --upload

# --view View Lighthouse traces, which were uploaded to Google Drive, in DevTools. See _Defining view_ below.
pwmetrics --view

##
## CLI options useful for CI
##

# --expectations Assert metrics results against provides values. See _Defining expectations_ below.
pwmetrics --expectations

# --fail-on-error Exit PWMetrics with an error status code after the first unfilled expectation.
pwmetrics --fail-on-error

```

### Defining config

```sh
# run pwmetrics with config in package.json
pwmetrics --config
```

`package.json`
```
...
"pwmetrics": {
"url": "http://example.com/",
// other configuration options
}
...
```

```sh
# run pwmetrics with config in pwmetrics-config.js
pwmetrics --config=pwmetrics-config.js
```

`pwmetrics-config.js`

```js
module.exports = {
url: 'http://example.com/',
// other configuration options. Read _All available configuration options_
}
```

### All available configuration options

`pwmetrics-config.js`

```js
const METRICS = require('pwmetrics/lib/metrics');

module.exports = {
url: 'http://example.com/',
flags: { // AKA feature flags
runs: 3, // number or runs
submit: true, // turn on submitting to Google Sheets
upload: true, // turn on uploading to Google Drive
view: true, // open uploaded traces to Google Drive in DevTools
expectations: true, // turn on assertion metrics results against provides values
json: true, // not required, set to true if you want json output
outputPath: 'stdout', // not required, only needed if you have specified json output, can be "stdout" or a path
chromePath: '/Applications/Google\ Chrome\ Canary.app/Contents/MacOS/Google\ Chrome\ Canary', //optional path to specific Chrome location
chromeFlags: '', // custom flags to pass to Chrome. For a full list of flags, see http://peter.sh/experiments/chromium-command-line-switches/.
// Note: pwmetrics supports all flags from Lighthouse
showOutput: true, // not required, set to false for pwmetrics not output any console.log messages
failOnError: false // not required, set to true if you want to fail the process on expectations errors
},
expectations: {
// these expectations values are examples, for your cases set your own
// it's not required to use all metrics, you can use just a few of them
// Read _Available metrics_ where all keys are defined
[METRICS.TTFCP]: {
warn: '>=1500',
error: '>=2000'
},
[METRICS.TTLCP]: {
warn: '>=2000',
error: '>=3000'
},
[METRICS.TTI]: {
...
},
[METRICS.TBT]: {
...
},
[METRICS.SI]: {
...
},
},
sheets: {
type: 'GOOGLE_SHEETS', // sheets service type. Available types: GOOGLE_SHEETS
options: {
spreadsheetId: 'sheet_id',
tableName: 'data',
uploadMedian: false // not required, set to true if you want to upload only the median run
}
},
clientSecret: {
// Data object. Can be get
// either
// by (using everything in step 1 here)[https://developers.google.com/sheets/api/quickstart/nodejs#step_1_turn_on_the_api_name]
//
// example format:
//
// installed: {
// client_id: "sample_client_id",
// project_id: "sample_project_id",
// auth_uri: "https://accounts.google.com/o/oauth2/auth",
// token_uri: "https://accounts.google.com/o/oauth2/token",
// auth_provider_x509_cert_url: "https://www.googleapis.com/oauth2/v1/certs",
// client_secret: "sample_client_secret",
// redirect_uris: [
// "url",
// "http://localhost"
// ]
// }
//
// or
// by (using everything in step 1 here)[https://developers.google.com/drive/v3/web/quickstart/nodejs]
}
}
```

### Defining expectations

> [Recipes](/recipes) for using with CI

```sh
# run pwmetrics with config in package.json
pwmetrics --expectations
```

`package.json`
```
...
"pwmetrics": {
"url": "http://example.com/",
"expectations": {
...
}
}
...
```

```sh
# run pwmetrics with config in pwmetrics-config.js
pwmetrics --expectations --config=pwmetrics-config.js
```

### Defining submit

Submit results to Google Sheets

*Instructions:*

- Copy [this spreadsheet](https://docs.google.com/spreadsheets/d/17jgt_uKxm4WvROmKMfSDzhdCAstNvyaiDP_k2XqzgD0).
- Copy the ID of the spreadsheet into the config as value of `sheets.options.spreadsheetId` property.
- Setup Google Developer project and get credentials. ([everything in step 1 here](https://developers.google.com/sheets/api/quickstart/nodejs#step_1_turn_on_the_api_name))
- Take a `client_secret` and put it into the config as value of `clientSecret` property.

```sh
# run pwmetrics with config in package.json
pwmetrics --submit
```

```sh
# run pwmetrics with config in pwmetrics-config.js
pwmetrics --submit --config=pwmetrics-config.js
```

`pwmetrics-config.js`
```js
module.exports = {
'url': 'http://example.com/',
'sheets': {
...
},
'clientSecret': {
...
}
}
```

### Defining upload

Upload Lighthouse traces to Google Drive

*Instructions:*

- Setup Google Developer project and get credentials. ([everything in step 1 here](https://developers.google.com/drive/v3/web/quickstart/nodejs))
- Take a `client_secret` and put it into the config as value of `clientSecret` property.

```sh
# run pwmetrics with config in package.json
pwmetrics --upload
```

```sh
# run pwmetrics with config in pwmetrics-config.js
pwmetrics --upload --config=pwmetrics-config.js
```

`pwmetrics-config.js`
```js
module.exports = {
'url': 'http://example.com/',
'clientSecret': {
...
}
}
```

### View Lighthouse traces in timeline-viewer

Show Lighthouse traces in timeline-viewer.

> Required to use `upload` flag

[timeline-viewer](https://chromedevtools.github.io/timeline-viewer/) - Shareable URLs for your Chrome DevTools Timeline traces.

```sh
# run pwmetrics with config in package.json
pwmetrics --upload --view
```

```sh
# run pwmetrics with config in your-own-file.js
pwmetrics --upload --view --config=your-own-file.js
```

`pwmetrics-config.js`
```js
module.exports = {
'url': 'http://example.com/',
'clientSecret': {
...
}
}
```

#### Available metrics:

All metrics now are stored in separate constant object located in `pwmetrics/lib/metrics/metrics`;

```js
// lib/metrics/metrics.ts
{
METRICS: {
TTFCP: 'firstContentfulPaint',
TTLCP: 'largestContentfulPaint',
TBT: 'totalBlockingTime',
TTI: 'interactive',
SI: 'speedIndex'
}
}
```

Read article [Performance metrics. What’s this all about?](https://medium.com/@denar90/performance-metrics-whats-this-all-about-1128461ad6b) which is decoding this metrics.

### API

```js
const PWMetrics = require('pwmetrics');

const options = {
flags: {
runs: 3, // number or runs
submit: true, // turn on submitting to Google Sheets
upload: true, // turn on uploading to Google Drive
view: true, // open uploaded traces to Google Drive in DevTools
expectations: true, // turn on assertation metrics results against provides values
chromeFlags: '--headless' // run in headless Chrome
}
};

const pwMetrics = new PWMetrics('http://example.com/', options); // _All available configuration options_ can be used as `options`
pwMetrics.start(); // returns Promise

```

#### Options

Option
Type
Default
Description

flags^*
Object


{

  runs: 1,

  submit: false,

  upload: false,

  view: false,

  expectations: false,

  disableCpuThrottling: false,

  chromeFlags: ''

}

Feature flags

expectations
Object
{}
See Defining expectations above.

sheets
Object
{}
See Defining submit above.

clientSecret
Object
{}

Client secrete data generated by Google API console.
To setup Google Developer project and get credentials apply everything in step 1 here.

^*pwmetrics supports all flags from Lighthouse. See [here](https://github.com/GoogleChrome/lighthouse/#cli-options) for the complete list.

### Recipes

- [gulp](/recipes/gulp/gulpfile.js)

### License

Apache 2.0. Google Inc.