The speed of a website can be a critical factor to its success. Nobody likes a slow website. To be honest, there are plenty of such tools but you can find the best in this list, you are welcome - https://www.plerdy.com/blog/check-website-speed/
Many webmasters complained about the speed of loading pages that Google showed. This problem also touched me, so I found a stable alternative tool host-tracker.com/InstantCheck/Create?type=Waterfall It shows objective statistics on the speed of loading pages.