CSS Performance analysis
It could help you to find weak points in your web apps. The output & the goal is similar to CSS Selector Profiler (which was removed from Blink https://code.google.com/p/chromium/issues/detail?id=265486).
This extension will show show you some information about parsed selectors from your document.styleSheets. The speed of querySelectorAll, total & average amount of time of Recalculate Styles for the founded elements & the total amount of them.
How to use:
- open web page
- open your dev tools console
- click on css_perf icon in address bar
- check the console output
Please report any issues: https://github.com/jslayer/css-perf/issues/new