[base698]

What do you even mean by scale in this context?

https://en.wikipedia.org/wiki/V8_%28JavaScript_engine%29

V8 increases performance by compiling JavaScript to native machine code (x86,[2] ARM,[2] or MIPS[3] CPUs), before executing it, versus executing bytecode or interpreting it. Further performance increases are achieved by employing optimization methods such as inline caching.

[el_presidente]

I mean the language itself, not the performance of the individual implementations. For example, I can't imagine prototype based OO being used for large scale projects.