Perform garbage collection after each pruning iteration
Perform garbage collection after each pruning iteration

chatelak/RMG-Py,nyee/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py,nyee/RMG-Py,pierrelb/RMG-Py