perfume.js

Web performance library for measuring all User-centric performance metrics, including the latest Web Vitals.

v9.4.0 URL: https://unpkg.com/perfume.js@9.4.0/dist/perfume.umd.min.js

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sitespeed.io

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

v35.6.0 URL: https://unpkg.com/sitespeed.io@35.6.0/index.js

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performance web rules har webperf perfmatters navigation-timing browser

page-timing

⏱ Collect and measure browser performance metrics

v3.1.5 URL: https://unpkg.com/page-timing@3.1.5/src/index.js

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browser website page performance measure speed loading navigation-timing ⏱

@unionfab/perfume.js

Web performance library for measuring all User-centric performance metrics, including the latest Web Vitals.

v9.0.1 URL: https://unpkg.com/@unionfab/perfume.js@9.0.1/dist/lib/perfume.js

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@sumup/performance-observer

Generic PerformanceObserver API wrapper for measuring performance metrics

v1.0.2 URL: https://unpkg.com/@sumup/performance-observer@1.0.2/dist/performance-observer.es5.umd.min.js

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performance web-vitals custom metrics first-contentful-paint first-paint first-input-delay largest-contentful-paint cumulative-layout-shift time-to-first-byte element-timing navigation-timing resource-timing user-timing longtask