Goalpost-moving? You mean in my OP where I asked whether it benefits the average user? Where I said that the majority of performance issues remain in the DOM?

Goalpost-moving? You mean in my OP where I asked whether it benefits the average user? Where I said that the majority of performance issues remain in the DOM? I moved no goalpost. I am saying exactly what I always said. What the GP said that they are doing is almost certainly an ill-conceived project because JavaScript -- without a major change like asm.js -- simply cannot offer competitive performance as a facet of the language. Which is why we don't build a renderer in JavaScript, but instead layer it over WebGL, for instance.