How many workers to run with — resolve

NULL or true means "as many as this machine can spare", which is one fewer than its physical cores — leaving one is what keeps the session it was launched from responsive. false or 1 is sequential. options(mc.cores=) overrides the default, since that is the option R users already reach for.

Usage

resolve_workers(workers = NULL, n = 1L, quiet = FALSE)

Arguments

workers: the configured value: NULL, a logical, or a count
n: how many tasks there are to spread
quiet: whether to suppress the Windows fallback message

Value

an integer worker count, at least 1

Details

Capped at n, since a task list of six cannot use twelve workers; forced to 1 on Windows, where taupatch_lapply() cannot fork; and capped again at whatever core_ceiling() allows.