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Javascript doesn't compile to native code, so isn't as fast. I've never tried LuaJIT, though, that's supposed to be on par with Julia.

> Javascript doesn't compile to native code, so isn't as fast.

There are AOT compilers for JS.

So there is for Python, but it's still slow. JS has slow semantics. It can't be made in the same performance league as Julia.

I think you mean Julia is on par with LuaJIT? ..maybe exceeds?