  A description is presented of the algorithms used to reconstruct energy
deposited in the CMS hadron calorimeter during Run 2 (2015-2018) of the LHC.
During Run 2, the characteristic bunch-crossing spacing for proton-proton
collisions was 25 ns, which resulted in overlapping signals from adjacent
crossings. The energy corresponding to a particular bunch crossing of interest
is estimated using the known pulse shapes of energy depositions in the
calorimeter, which are measured as functions of both energy and time. A variety
of algorithms were developed to mitigate the effects of adjacent bunch
crossings on local energy reconstruction in the hadron calorimeter in Run 2,
and their performance is compared.
