I think the biggest reason for this is that to get the power of multiple dispatch, you would need to write all your code using C++ templates. Doing so to the extent Julia does would absolutely kill your compile times due to the lack of a JIT. Julia’s macros are also a huge part of the story here. Tools like LoopVectorization mean that idiots like me can write the equivalent to hand optimized assembly for any loop that is even a vague hotspot.
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