Pagespeed ou GTMetrix: quais as diferenças e qual é mais preciso?

A velocidade de um site é um dos fatores de classificação SEO. Por isso, há algumas ferramentas que testam a velocidade de um site.

Low score on google pagespeed insight and GTmetrix – Brizy Help Center

Google PageSpeed Insights Versus GTmetrix

Why Google Pagespeed or GTMetrix scores aren't relevant

Scoring 100/100 in Google PageSpeed Insights, GTmetrix PageSpeed and Yslow (and why you probably shouldn't bother ;) - - Premium WordPress Themes

Scoring 100/100 in Google PageSpeed Insights, GTmetrix PageSpeed and Yslow (and why you probably shouldn't bother ;) - - Premium WordPress Themes

javascript - How can I optimize Google Analytics for GTmetrix? - Webmasters Stack Exchange

GTmetrix: como medir a performance do seu site?

GTmetrix - page speed analysis tool - Silicon Dales

PageSpeed Insights VS gtmetrix - Questions - Forum

How to Use the GTmetrix Speed Test to Improve PageSpeed Score

Curso de Otimização WordPress (Nota A no GT Metrix e 100 no PageSpeed)

What is GTMetrix and How Can It Help Your Business Online?, by Declan Kay

Divi Performance & Speed - Divi's Secret To Super Fast Load Times

Why is my GTmetrix Performance Score different from PageSpeed Insights, WebPageTest, and web.dev?

Improve Your GTMetrix Score In Under 30 Minutes