Memory best practices in Julia with Arrays vs Vectors

New to Julia
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15

Don’t benchmark with non-const global variables.

function bench_svector(M, n_steps)
    for step in 1:n_steps
        delta_M = step / n_steps
        out =  M .+ (SVector(delta_M, delta_M),)
    end
end
function bench_matrix(M, n_steps)
    for step in 1:n_steps
        delta_M = step / n_steps
        out = M .+ delta_M
    end
end

julia> @btime bench_svector(M, 10^5)
  2.988 ms (100000 allocations: 10.68 MiB)
julia> @btime bench_matrix(M, 10^5)
  3.254 ms (100000 allocations: 10.68 MiB)