CSS Profiling and Optimization

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Just as I got done saying how I hope we can soon stop talking about CSS selector performance, Juriy Zaytsev publishes some great research on selector performance using Opera and WebKit’s new “style profiler” as part of the dev tools. He was able to save 650ms on page load time on a CSS3 heavy one-page app. Big difference makers: number of selectors, universal selectors, border-radius, and transforms. Worth a thorough read through.

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