Regarding [0], startup time is a commonly acknowledged issue which affects the 'hello world' benchmark. (Can you even call it a benchmark? Maybe if startup time

Regarding [0], startup time is a commonly acknowledged issue which affects the 'hello world' benchmark. (Can you even call it a benchmark? Maybe if startup time is what you're comparing then it makes sense, other wise I don't agree.) I used to call Fortran code from Python for a particularly complex function (Mittag-Leffler function) from Python, I then rewrote everything in Julia and it runs approx 10-20x faster. So there you go, I'm a primary source. Edit: just for clarity: The Mittag-Leffler function itself runs just ever so slightly faster in Julia than Fortran-called-from-Python (due to the probably inefficient way I was sending and receiving the data to/from a Python subprocess, which itself is an example of the difficulty of combining two languages). It is the program as a whole which runs 10-20x faster.