  We study the competition between stripe states with different periods and a
uniform $d$-wave superconducting state in the extended 2D Hubbard model at 1/8
hole doping using infinite projected entangled-pair states (iPEPS). With
increasing strength of negative next-nearest neighbor hopping $t'$, the
preferred period of the stripe decreases. For the values of $t'$ predicted for
cuprate high-T$_c$ superconductors, we find stripes with a period 4 in the
charge order, in agreement with experiments. Superconductivity in the period 4
stripe is suppressed at $1/8$ doping. Only at larger doping, $0.18 \lesssim
\delta < 0.25$, the period 4 stripe exhibits coexisting $d$-wave
superconducting order. The uniform $d$-wave state is only favored for
sufficiently large positive $t'$.
