Table 3. Computation Times (in min) and Number of Iterations for the Lowest Singlet Excited State of the Anthracene Molecule Using the aug-cc-pVTZ basis set.

	functional
	B2PLYP	CAM-B3LYP	ωB2PLYP	RS-B88-LYP
SCF iterationa	0.37	0.55	0.69	0.69
TDA iterationa	0.73	0.94	1.11	1.11
integral transformationb	0.73	–	0.73	0.73
second-order correctionsc	0.78	–	0.78	3.98
no. of the SCF iterations	13	13	14	14
no. of the TDA iterations	11	12	12	12
total wall-clock time	14.4	18.4	24.5	27.7

^aWall-clock time per iteration step.

^bWall-clock time for the occupied–occupied and occupied–virtual blocks of the three-center integral list.

^cWall-clock time for the second-order corrections.