I think that is absolutely a fair criticism. Personally, I rarely run into an issue where I absolutely am bottlenecked by a slow loop. But this sort of thing dr

I think that is absolutely a fair criticism. Personally, I rarely run into an issue where I absolutely am bottlenecked by a slow loop. But this sort of thing drew me to Julia in the first place. There was also an R update in ~2017 that introduced some JIT speed-ups for loops, which made a noticeable difference. If this is a problem you run into often, I suggest converting your object to a data.table. You can pass a function row-wise over the object very quickly: https://stackoverflow.com/questions/25431307/r-data-table-apply-function-to-rows-using-columns-as-arguments https://stackoverflow.com/questions/25431307/r-data-table-ap...