As far as Julia is concerned, changing distributions shouldn’t make a big performance difference. What matters is to use a fast BLAS and to have Julia generate code targeted to your CPU rather than to a generic x86_64. The former is done automatically by OpenBLAS, which dynamically chooses the appropriate kernels for your CPU (though you can also use another BLAS like MKL). The latter can be achieved by rebuilding the sysimage or by compiling Julia from source.
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