During performance tuning of Alibaba.com’s PC new‑user homepage, the Time To First Byte became acceptable while the First Contentful Paint remained 3 seconds slower, revealing that CSS download and parsing blocked rendering and that inlining critical CSS dramatically reduced FCP latency.
This article presents a comprehensive guide to front‑end performance optimization, covering metric selection (FCP, LCP, TTI, x‑fmp), data collection and reporting, dashboard creation, network‑ and application‑layer bottleneck analysis, and concrete code‑level improvements for faster page loads.
This article explains the core web performance metrics—First Paint, First Contentful Paint, Time to Interactive, Largest Contentful Paint, and First Meaningful Paint—along with how to retrieve them via the Performance API, calculate them, and interpret their impact on user experience.
This article explains essential web performance metrics such as First Paint, First Contentful Paint, First Meaningful Paint, Largest Contentful Paint, Time to Interactive, and related indicators, showing how they reflect different stages of page rendering and user experience.
