I will copy my reply to this figure from another post to make sure readers understand what you are putting out.
on top of that, you are intentionally, or unknowingly, trying to equal JS speed to page loading speed, which is totally bogus.
yet they are entirely related. It would be BOGUS to suggest they're mutually exclusive. Not all pages have scripts on them, many do. Javascript is getting more and more important. It would be moronic to not take javascript speeds into account when choosing a web browser.