  The Time Renormalization Group (TRG) is an effective method for accurate
calculations of the matter power spectrum at the scale of the first baryonic
acoustic oscillations. By using a particular variable transformation in the TRG
formalism, we can reduce the 2D integral in the source term of the equations of
motion for the power spectrum into a series of 1D integrals. The shape of the
integrand allows us to pre-compute only thirteen antiderivatives numerically,
which can then be reused when evaluating the outer integral. While this
introduces a few challenges to keep numerical noise under control, we find that
the computation time for nonlinear corrections to the matter power spectrum
decreases by a factor of 50. This opens up the possibility to use of TRG for
mass production as in Markov Chain Monte Carlo methods. A Fortran code
demonstrating this new algorithm has been made publicly available.
