Is there a place to see css benchmarks on modern browsers, like jsperf used to be for JS? It seems like > *+*, *:not(first-child), *:nth-child(1+n) and *:last-

Is there a place to see css benchmarks on modern browsers, like jsperf used to be for JS? It seems like > *+*, *:not(first-child), *:nth-child(1+n) and *:last-child { ...revert... } are all equivalent. I would be curious to know which is most efficient.