What dependencies are required?

This skill utilizes Playwright along with the playwright-lighthouse and lighthouse npm packages to perform audits and collect metrics.

Can I simulate slow network conditions?

Yes, it includes methods to emulate 3G connections and CPU throttling to ensure your site remains usable for users on lower-end devices or slow networks.

Can I fail a build if performance scores drop?

Yes, you can define performance budgets and thresholds. If the audit score falls below your specified limit, the Playwright test will fail, alerting your team.

Does this skill support Core Web Vitals?

Absolutely. It provides patterns for measuring Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID) directly within your tests.

Can I run Lighthouse tests on both mobile and desktop?

Yes, this skill includes configurations to simulate both environments, allowing you to define specific screen sizes, device scale factors, and throttling rates for each.

Performance Testing & Web Vitals

Name: Performance Testing & Web Vitals
Author: adaptationio

byadaptationio

0•

安全与测试

Measures and enforces web performance standards using Lighthouse audits and Core Web Vitals within Playwright.

This skill enables developers to integrate comprehensive performance benchmarking directly into their automated testing suites. By leveraging Lighthouse and Playwright, it provides a standardized way to measure Core Web Vitals, enforce performance budgets, and simulate real-world constraints like network throttling or CPU slowdowns. It is ideal for teams looking to prevent performance regressions and ensure high-quality user experiences by auditing page load times, visual stability, and resource efficiency during every CI/CD run.

主要功能

01Customizable performance budgets with threshold-based test failure

020 GitHub stars

03Real-time Core Web Vitals tracking including LCP, CLS, and FID

04Detailed HTML and JSON performance reporting for historical analysis

05Network and CPU throttling for mobile and desktop simulation

06Automated Lighthouse audits for Performance, SEO, and Accessibility

使用场景

01Preventing performance regressions in CI/CD pipelines

02Benchmarking mobile vs. desktop user experiences under throttled conditions

03Auditing the impact of third-party scripts on page load speed

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add adaptationio/skrillz performance-testing

For use in Claude.ai and ChatGPT

Download Skill