Mozilla disagrees. https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writing_efficient_CSS https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writi...

Mozilla disagrees. https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writing_efficient_CSS https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writi... They explicitly state using css classes is more performant than using tags. I'd be interested in a CSSPerf(Do they have those?)