While I am a believer in writing performance sensitive code in performant programming languages, I would argue that it matters. A lot of numerical software is

While I am a believer in writing performance sensitive code in performant programming languages, I would argue that it matters. A lot of numerical software is Python glue code written around compiled kernels (written in C++, Rust, Fortran, etc) but the runtime of that glue code usually does impact the total runtime in a non-negligible way. So all wins are good to take.