This seems like an FFT based benchmark.... I believe NumPy for licensing reasons includes a port of old FFTPACK which is only single threaded. (Py)FFTW or others are surely much faster.
So the test seems to compare one thread of a CPU launched in 2016 running a port of 40year old fortran code to a optimised FFT library on a GPU launched in 2020.
So the test seems to compare one thread of a CPU launched in 2016 running a port of 40year old fortran code to a optimised FFT library on a GPU launched in 2020.