Common pool parallelism. To allow simpler use and management
when common pool threads are disabled, we allow the underlying
common.parallelism field to be zero, but in that case still report
parallelism as 1 to reflect resulting caller-runs mechanics.
Common pool parallelism. To allow simpler use and management when common pool threads are disabled, we allow the underlying common.parallelism field to be zero, but in that case still report parallelism as 1 to reflect resulting caller-runs mechanics.