All downvoted ? If not performance of [ONE] feature like JS engine, what would make Chrome better ? (crippling others). JS is used so much only because all other options are kept broken (since Microsoft JS XMLHttpRequest - for applications not documents, being the lowest common denominator - against few bugs that needed to be fixed, not much changed) - otherwise there will be no need of JS for documents processing and less energy wasted - and the bill is payed not by corporations but by users, with extra tracking taxes.