GTmetrix is Now Powered by Lighthouse

GTmetrix is now powered by Lighthouse, with a new Report Page design that includes Web Vitals scores, Test Locations and more. Previously, GTmetrix ran your page against PageSpeed and YSlow best practices for how to build a website for speed, and the resulting scores represented how well you adhered to those best practices.

Hopefully, with this change, you will no longer get super slow loading websites with A+ scores.