Web site speed test - Devtools

GTmetrix

GTmetrix has a suite of features and options to make optimizing your website clear and easy.
https://gtmetrix.com/

https://gtmetrix.com/

PageSpeed Insights

PageSpeed ​​Insights Get your PageSpeed score and use PageSpeed suggestions to make your web site faster through our online tool.
https://developers.google.com/speed/pagespeed/insights/

https://developers.google.com/speed/pagespeed/insights/

Pingdom

The test is designed to help make your site faster by identifying what about a webpage is fast, slow, too big, and so on.

https://tools.pingdom.com/