   Returns the number of schedulers in the VM.
   """
   @spec schedulers :: pos_integer
+  @doc since: "1.3.0"
   def schedulers do
     :erlang.system_info(:schedulers)
   end

  Inlined by the compiler.
  """
  @spec os_time() :: integer
  def os_time do
    :os.system_time()
  end

  Returns the number of schedulers online in the VM.
  """
  @spec schedulers_online :: pos_integer
  @doc since: "1.3.0"
  def schedulers_online do
    :erlang.system_info(:schedulers_online)
  end
