FCP
A curated list of web performance metrics, tools, and concepts for measuring page speed and user experience.
What is FCP?
Awesome Page Speed Metrics is a curated GitHub repository that serves as a reference guide for web performance measurement. It aggregates definitions, tools, and resources for understanding key metrics like Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID) that impact page speed and user experience. The project helps developers identify what to measure, how to measure it, and which tools to use for both lab and real-user monitoring.
Frontend developers, performance engineers, and web developers who need to measure, analyze, and optimize website performance. It's particularly useful for those implementing performance budgets, monitoring Core Web Vitals, or setting up real-user monitoring (RUM).
It saves time by consolidating scattered performance resources into a single, well-organized reference. Unlike generic documentation, it provides practical code snippets, tool comparisons, and clear metric explanations tailored for immediate implementation.
Overview
⚡Metrics to help understand page speed and user experience
Use Cases
Best For
- Understanding Core Web Vitals and other key performance metrics
Related Projects
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