Alternate BLAS libraries?

General Usage
6

This is interesting:

julia> @btime dot($a1, $a2)
  22.762 ns (0 allocations: 0 bytes)
18.782035065611815

julia> @btime dot($s1, $s2)
  70.213 ns (0 allocations: 0 bytes)
18.782035065611826

julia> @btime dot($(vec(a1)), $(vec(a2)))
  23.527 ns (0 allocations: 0 bytes)
18.782035065611815

julia> @btime dot($(vec(s1)), $(vec(s2)))
  15.570 ns (0 allocations: 0 bytes)
18.782035065611815

It seems like dot for SArrays is not optimized very well.

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