Google uses page speed in mobile search and ad ranking, and their Lighthouse tool provides the PageSpeed Insights (PSI) score to help you measure and boost your page’s performance. Let’s look under the hood at how it works.
The PSI score is between 0 and 100 and is generated from…
I built a HTML Flamegraph tool that help you visualise and diagnose where your HTML payload bytes come from:
See some examples below: