julia> f(x,y) = x .+ y
f (generic function with 1 method)

julia> f.([1, 2, 3], Ref([4, 5, 6]))
3-element Array{Array{Int64,1},1}:
 [5, 6, 7]
 [6, 7, 8]
 [7, 8, 9]

using ThreadsX

f(x,y) = x .+ y
y = collect(1:1000);
ThreadsX.map(x -> f(x, y), 1:1000000)

julia> let x::Int = 0
           struct Foo
               x::Int
               function Foo()
                   x += 1
                   new(x)
               end
           end
       end

julia> Foo()
Foo(1)

julia> Foo()
Foo(2)

julia> Foo()
Foo(3)