The new version of GTMetrix page speed tool has now switched to using Google Lighthouse v6 engine which includes new Google Core Web Vital metrics for Largest Contentful Paint, Total Blocking Time, Cumulative Layout Shift as well as Time To First Byte and Time to Interactive. Check out their blog post explaining the changes at Everything you need to know about the new GTmetrix Report (powered by Lighthouse) and my outline for Google PageSpeed Insights and Google Lighthouse.
I did a few updated GTMetrix runs for this WordPress blog site from several geographic locations available on the free GTMetrix plan shown below.
GTMetrix San Antonio, Texas – Cable 5Mbps Chrome desktop
GTMetrix London, UK – Cable 5Mbps Chrome desktop
GTMetrix Sydney, Australia – Cable 5Mbps Chrome desktop
GTMetrix Sao Paulo, Brazil – Cable 5Mbps Chrome desktop
GTMetrix Mumbia, India – Cable 5Mbps Chrome desktop