Perhaps you misread. C most likely is, or at least more reliably. JS engines specialise to proper arrays most of the time, though. They're quite remarkably fas

Perhaps you misread. C most likely is, or at least more reliably. JS engines specialise to proper arrays most of the time, though. They're quite remarkably fast, much like PyPy. CPython, the original Python interpreter written in C, is not particularly fast at anything.