Benchmark calculations were performed on 4x8 Intel Xeon E5-4640 using 4 threads. The benchmark set consists of diverse types of electronic structure, including water clusters of increasing size, the uracil molecule, a nucleobase trimer (ATT, adenine-thymine-thymine), an aromatic diradical (C 6 H 5 N), the benzene molecule, and the G2 set 37 containing 148 molecules. We tested basis sets of the double-, triple-, and quadruple-zeta quality, with and without diffuse functions. All Cartesian geometries are given in Supplementary Information (SI).