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. 2022 Jul 20;18(8):4733–4744. doi: 10.1021/acs.jctc.2c00261

Table 4. Wall Times for the Edmiston–Ruedenberg Localization of the Occupied Orbitals of Gramicidin and Catenane Using the cc-pVDZ Basis and the Number of Macroiterations Needed to Reach Convergence (NiER)a.

      initial guess
system τ tSCF canonical Cholesky Foster–Boys
gramicidin 10–2 2.65 h 2.49 h 1.47 h 37.00 min
catenane   21.95 min 6.29 min 3.72 min 3.35 min
gramicidin 10–8 2.65 h 14.59 h 8.18 h 3.67 h
catenane   21.95 min 28.44 min 15.62 min 12.41 min
a

Different initial guesses for the orbitals are compared: canonical, Cholesky, and Foster–Boys orbitals. The wall times used to converge the SCF equations (tSCF) are also given.