Web page performance is very important in a website, as it directly impacts your ROI. A slow website will have a high rate of abandonment and is a source of frustration for your visitors. One of the ways to ensure you are not caught in this situation is to measure web page performance every time you deploy a new feature. To demo this we are going to use: webpagetest.org – The tests will be invoked using its REST API via a Node module Appveyor – A CI service to run the tests First we need to create an API key at webpagetest.