Yes, Javascript will still be the fastest option with the cleanest support. That's because browser vendors have intentionally put everything else at a disadvant

Yes, Javascript will still be the fastest option with the cleanest support. That's because browser vendors have intentionally put everything else at a disadvantage (Mozilla ensuring nobody puts Brendan Eich's baby in a corner). The most anyone can really do is generate slight variations on the spelling of Javascript, which has other big disadvantages. All of this is a downside compared to normal programming.