This is a bizarrely misinformed comment. You can write vectorized code in Julia as much as you want and it's generally as fast as it is in Matlab or NumPy, alth

This is a bizarrely misinformed comment. You can write vectorized code in Julia as much as you want and it's generally as fast as it is in Matlab or NumPy, although there are a few cases where it can be up to 2x slower; we're working on those. The difference is that you can write for loops and those will be as fast as for loops in C. Julia's vectorized code only looks bad in comparison to its for loops – because those are even faster.