https://github.com/msn0/teti

CLI for testing DOM timings built upon Headless Chrome & Lighthouse 💜
https://github.com/msn0/teti

cli first-paint lighthouse performance timings

Last synced: 7 days ago
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CLI for testing DOM timings built upon Headless Chrome & Lighthouse 💜

• Host: GitHub
• URL: https://github.com/msn0/teti
• Owner: msn0
• Created: 2017-05-11T18:37:28.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2023-01-04T21:38:01.000Z (almost 2 years ago)
• Last Synced: 2024-11-07T19:20:06.109Z (8 days ago)
• Topics: cli, first-paint, lighthouse, performance, timings
• Language: JavaScript
• Homepage:
• Size: 2.87 MB
• Stars: 14
• Watchers: 2
• Forks: 3
• Open Issues: 11
• Metadata Files:
  • Readme: README.md

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> CLI for testing DOM timings built upon [Headless Chrome](https://developers.google.com/web/updates/2017/04/headless-chrome) & [Lighthouse](https://github.com/GoogleChrome/lighthouse) 💜

[![Build Status](https://travis-ci.org/msn0/teti.svg?branch=master)](http://travis-ci.org/msn0/teti)

## Installation

```

npm i -g teti

```

## Usage

```

$ teti --help

Usage

  $ teti 

Options

  -n          number of tests to run (10 is default)

  --custom    custom User Timing (performance.mark) to be measured

  --verbose   output all data

```

## Examples

```

➜ teti google.com

Results for http://google.com based on 10 requests:

        Timing  median  mean   p95    σ²   MAD

    domLoading     0.2   0.2  0.22  0.18  0.01

domInteractive    0.29  0.29  0.32  0.36  0.02

   domComplete    0.67  0.68  0.83  3.34  0.03

   first-paint    0.35  0.35   0.4  0.44  0.01

```

```

➜ teti https://www.theguardian.com/football -n 30 --custom "commercial boot"

Results for https://www.theguardian.com/football based on 30 requests:

         Timing  median  mean   p95      σ²   MAD

     domLoading    0.16  0.16  0.17    0.03     0

 domInteractive    0.68  0.67   0.8    7.73  0.07

    domComplete    3.42  3.58  4.94  284.16   0.3

    first-paint    0.34  0.34  0.38    0.58  0.01

commercial boot    0.87  0.84  1.06   17.73   0.1

```

## Metrics & Timings

By default teti collects the following timings:

* [domLoading](https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/domLoading)

* [domInteractive](https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/domInteractive)

* [domComplete](https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/domComplete)

* [first-paint](https://github.com/WICG/paint-timing)

Based on collected data, the following statistical metrics are calculated:

* [median](https://en.wikipedia.org/wiki/Median)

* [mean](https://en.wikipedia.org/wiki/Mean)

* p95 - 95th [percentile](https://en.wikipedia.org/wiki/Percentile)

* σ² - [variance](https://en.wikipedia.org/wiki/Variance)

* MAD - [median absolute deviation](https://en.wikipedia.org/wiki/Median_absolute_deviation)

## License

MIT © [Michał Jezierski](https://github.com/msn0)