  Most DFT practitioners use regular grids (Monkhorst-Pack, MP) for
integrations in the Brillioun zone. Although regular grids are the natural
choice and easy to generate, more general grids whose generating vectors are
not merely integer divisions of the reciprocal lattice vectors, are usually
more efficient.\cite{wisesa2016efficient} We demonstrate the efficiency of
\emph{generalized regular} (GR) grids compared to Monkhorst-Pack (MP) and
\emph{simultaneously commensurate} (SC) grids. In the case of metals, for total
energy accuracies of one meV/atom, GR grids are 60\% faster on average than MP
grids and 20\% faster than SC grids. GR grids also have greater freedom in
choosing the \kb-point density, enabling the practitioner to achieve a target
accuracy with the minimum computational cost.
