Why use @views in router.jl line 82

[guotie]

CFMMRouter.jl/src/router.jl

Line 82 in 5932e42

acc += @views dot(Λ, v[c.Ai]) - dot(Δ, v[c.Ai])

    # Objective function
    function fn(v)
        if !all(v .== r.v)
            find_arb!(r, v)
            r.v .= v
        end

        acc = 0.0

        for (Δ, Λ, c) in zip(r.Δs, r.Λs, r.cfmms)
            acc += @views dot(Λ, v[c.Ai]) - dot(Δ, v[c.Ai])   # This line, no varible changed, why use @views?
        end

        return f(r.objective, v) + acc
    end

acc += @views dot(Λ, v[c.Ai]) - dot(Δ, v[c.Ai]) This line, no varibles changed, why use @views?