It's fun to look back at how things evolve. In 2012, my team was working on creating a UI responsiveness tool for IE and Visual Studio (for Windows Store apps written using JavaScript). This was at a time when many of the default Windows applications were written using JS and we didn't have good tools for the Window's team to analyze performance problems. It took us a few sprints to get the data collection, analysis, and UI to be useful.
In the next sprint we enabled dynamic collection of data and added the initial CPU graph. 3/