Unexpectedly slow performance of "eigs" with a Hermitian view

General Usage Performance
2

I think what you are seeing is Slow sparse matrix-vector product with symmetric matrices

julia> @btime mul!($c, $A, $b);
  120.341 μs (0 allocations: 0 bytes)

julia> _A = Hermitian(A);

julia> @btime mul!($c, $_A, $b);
  37.587 ms (4008 allocations: 187.88 KiB)
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