By Addy Osmani CHAPTER 6Rendering Performance Tools in IE, Firefox and Safari
So far we’ve discussed tools for finding and fixing rendering performance
issues in Chrome. As rendering is still quite a new area for many Web de-
velopers to optimize for, the tools available for it in other browsers are still
evolving but I’m excited about the direction they’ve been taking.
The ie11 f12 DeveloPeR ToolS
Many developers are surprised to hear that IE’s developer tools have im-
proved by leaps and bounds of late. In IE11, the F12 developer tools intro-
duce a special UI Responsiveness feature for profiling perfomance issues
around jank, slowness and other common problems areas like CPU and
memory usage.
workflow
With IE11 installed and the UI Responsiveness tool loaded, you’ll be
prompted to begin a new performance profiling session in the main pane.