This is a follow up article to Measuring site performance with JavaScript on mobile, I suggest you read it before you continue. In the previous article I talked about the Navigation Timing spec, here I will talk about the Performance Timeline and Resource Timing specs and how they work in IE10, the first browser to implement them. I created a page that shows some of the data available and a library that generates a HAR that you can later analyse.

Continue reading “Measuring the speed of resource loading with JavaScript and HTML5” →