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Continuous Performance Analysis with Lighthouse CI and GitHub Actions

Lighthouse is a free and open-source tool for assessing your website’s performance, accessibility, progressive web app metrics, SEO, and more. The easiest way to use it is through the Chrome DevTools panel. Once you open the DevTools, you will see …

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Performance Budget Metrics

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Tim Kadlec groups all the things you could measure in a performance budget into four groups:

  1. Milestone timings (Example: time to visually complete)
  2. SpeedIndex (WebPageTest’s well-loved but isolated score)
  3. Quantity based metrics (Example: number of requests)
  4. Rule based metrics (Example:
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