  The current generation of all-sky surveys is rapidly expanding our ability to
study variable and transient sources. These surveys, with a variety of
sensitivities, cadences, and fields of view, probe many ranges of timescale and
magnitude. Data from the Zwicky Transient Facility (ZTF) yields an opportunity
to find variables on timescales from minutes to months. In this paper, we
present the codebase, ztfperiodic, and the computational metrics employed for
the catalogue based on ZTF's Second Data Release. We describe the publicly
available, graphical-process-unit optimized period-finding algorithms employed,
and highlight the benefit of existing and future graphical-process-unit
clusters. We show how generating metrics as input to catalogues of this scale
is possible for future ZTF data releases. Further work will be needed for
future data from the Vera C. Rubin Observatory's Legacy Survey of Space and
Time.
