returning initializer list mechanism

What mechanism is involved, if when returning types, that are constructible from initializer lists, I don't specify the type I am returning, as in:

std::array<int, 3> make_array()
{
  return { 1, 2, 3 };
}

instead of

std::array<int, 3> make_array()
{
  return std::array<int, 3>{ 1, 2, 3 };
}

Are there any performance penalties involved, if I return the initializer list without specifying a type? Am I actually returning an array, that is converted into a std::array?