slycoder

macro singleton(ex)
  v = eval(ex)
  :($v)
end

function demo()
	y = @singleton zeros(Int64, 1000000)
	for ii in 1:1000000
		@inbounds y[ii] += 3
	end

slycoder

begin
  local y::Vector{Int64} = zeros(Int64, 1000000)
  global demo2
  function demo2()
    x = y
    for ii in 1:1000000
      @inbounds x[ii] += 3
    end
    return x
  end