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 explains what Time to First Byte (TTFB) actually measures, why network latency and server processing heavily influence it, and lists the many factors—from DNS lookup to CDN routing—that can increase TTFB, helping developers prioritize performance improvements.
This article explains why resource loading optimization is vital for mobile web development, shows how to measure page load speed with Chrome DevTools, breaks down the resource loading lifecycle, and provides practical solutions for queueing, high TTFB, and long download times.
This article explains how to use WebPageTest and HTTPArchive data to measure key website performance indicators, interprets their meanings and relationships, and provides baseline values for assessing a site’s speed, backend efficiency, and third‑party impact.
This article explains why websites load slowly, outlines key factors such as compression, image optimization, removing unnecessary assets, progressive rendering, and async scripts, and shows how to measure improvements with tools like WebPageTest and Chrome DevTools.
