MCE::Hobo uses MCE::Shared to retrieve data during reaping. MCE::Child uses MCE::Channel, no shared-manager. Version Cygwin Windows Linux macOS FreeBSD MCE::Child 1.842 19.099s 17.091s 0.965s 1.534s 1.229s MCE::Hobo 1.842 20.514s 19.594s 1.246s 1.629s 1.613s P::FM 1.20 19.703s 19.235s 0.875s 1.445s 1.346s MCE::Child 1.842 20.426s 18.417s 1.116s 1.632s 1.338s Moo loaded MCE::Hobo 1.842 21.809s 20.810s 1.407s 1.759s 1.722s Moo loaded P::FM 2.02 21.668s 25.927s 1.882s 2.612s 2.483s Moo used