I do not know Rust, but I know C and some Haskell and AFAIK one should building a program in Rust differently than in C/C++ (which is probably the authors backg

I do not know Rust, but I know C and some Haskell and AFAIK one should building a program in Rust differently than in C/C++ (which is probably the authors background). Get out a quick correct (and this can not be emphasized enough) version (obviously one has to learn the language here) and then optimize (when you have numbers). The author did not seem to get a working version with Rust (sorry, if I am wrong on this), and tried an approach that he knows would work for C/C++. But maybe another approach would have been already performant enough?