implement ThreadPool a2m reader
implement ThreadPool a2m reader

in prod, daily runtime went from 26min to 15min

akrherz/dep,akrherz/dep,akrherz/idep,akrherz/dep,akrherz/idep,akrherz/dep,akrherz/dep,akrherz/idep,akrherz/idep,akrherz/idep,akrherz/idep