Dlang does not has rank polymorphism and it handle array just fine with crazy speed in both compilation and execution.
It can be faster than Fortran based library that is still being used by Matlab, Rust and Julia [1].
It will be interesting to compare Mojo moblas BLAS library with GLAS library performance in D.
[1] Numeric age for D: Mir GLAS is faster than OpenBLAS and Eigen (2016):
http://blog.mir.dlang.io/glas/benchmark/openblas/2016/09/23/...