The computational cost ratio for κCSDM, tCSDM, and CSDM is roughly 1:3.5:4.5. These ratios show a significant speedup for κCSDM, which occurs because no overlap integrals or nonadiabatic coupling vectors are computed from electronic structure software. The computation time ratios for κTSH-EDC, TSH-EDC(TDC), TSH-EDC(NAC), and κCSDM are 0.7:0.8:1.6:1.0. This shows that the speedup of κTSH-EDC relative to TSH-EDC(NAC) is more than a factor of two even for this small molecule (as the molecule simulated gets larger, this timing savings is expected to become more significant; it could even be dramatic). However, κTSH is only 30% faster than the more accurate κCSDM method.