
PageSpeed is a useful tool for certain metrics but it lacks some specific details.
Using a tool that shows you a waterfall chart can give you a different angle on performance. GTMetrix, Webpagetest.org and DebugBear are examples of tools that provide a waterfall chart.
What’s a waterfall chart?
The waterfall chart shows a list of every file that your website loads, in the order that those requests are made.
So it pulls back the curtain and gives you a peek at what’s going on behind the scenes when someone visits your site in their browser. It helps you find bottlenecks, errors and other performance issues.




