At the core, Fortran uses multidimensional numerical arrays, with the shapes being defined being defined in the code. So the compiler knows much more about the

At the core, Fortran uses multidimensional numerical arrays, with the shapes being defined being defined in the code. So the compiler knows much more about the data that’s being operated on, which in theory allows better optimization. I thought blas/lapack is still written in Fortran, so most numerical code would still be built on top of Fortran.