  We study the equilibrium properties of the one-dimensional disordered
Bose-Hubbard model by means of a gauge-adaptive tree tensor network variational
method suitable for systems with periodic boundary conditions. We compute the
superfluid stiffness and superfluid correlations close to the superfluid to
glass transition line, obtaining accurate locations of the critical points. By
studying the statistics of the exponent of the power-law decay of the
correlation, we determine the boundary between the superfluid region and the
Bose glass phase in the regime of strong disorder and in the weakly interacting
region, not explored numerically before. In the former case our simulations are
in agreement with previous Monte Carlo calculations.
