description Lighthouse CI Overview
Lighthouse CI is an open source command-line tool designed to automate website performance testing. It utilizes Google's Lighthouse technology to assess web pages for issues impacting speed and efficiency. The tool generates detailed reports focusing on Core Web Vital metrics, making it valuable for developers, DevOps engineers, and anyone seeking to improve a website’s loading times and overall user experience.
help Lighthouse CI FAQ
What does Lighthouse CI add beyond running Lighthouse once in Chrome?
Lighthouse CI lets teams run Lighthouse automatically in pull requests, CI jobs, or scheduled checks. It can store reports, compare runs, and fail a build when performance budgets are missed.
Which metrics does Lighthouse CI usually track?
It uses Lighthouse metrics such as Largest Contentful Paint, Cumulative Layout Shift, Total Blocking Time, accessibility score, and SEO checks. Those results are useful because they show both lab performance and category-level regressions.
Can Lighthouse CI test a local preview build?
Yes. A common setup starts a local server, runs `lhci autorun`, and tests URLs such as `http://localhost:3000` before deployment. This makes it useful for React, Next.js, Vue, and static-site builds.
How is Lighthouse CI different from PageSpeed Insights?
PageSpeed Insights is a hosted Google tool for checking a page on demand, while Lighthouse CI is designed for automation inside a development workflow. Lighthouse CI is better when you want every GitHub pull request or build pipeline to catch regressions.
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