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Why not use Archlinux offical repository
If you are using AMD Ryzen series or EPYC series CPU, this package can boost the speed of fftw up around 30% compared to Archlinux official repository (Test on Ryzen 3700X).
Why not use Intel MKL
Intel MKL perform very poor on non-Intel CPUs, because it detect your CPU and switch to a slow path.
I know there are some environment variables such as `MKL_DEBUG_CPU_TYPE` or `MKL_NUM_THREADS`. But Intel removed these trick since MKL 2020 Update 1.
If you have problem on this package, report issue to here or AUR comment, have fun ^w^.
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