#586: ordering: use set operation when possible

Author: cwschilly

src/lbaf/Execution/lbsInformAndTransferAlgorithm.py

@@ -159,8 +159,9 @@ def __execute_information_stage(self):
             msg = Message(0, {r_snd})
 
             # Broadcast message to random sample of ranks excluding self
+            other_ranks = [r for r in phase_ranks if r!= r_snd] if self._deterministic_transfer else phase_ranks.difference({r_snd})
             for r_rcv in random.sample(
-                [r for r in phase_ranks if r != r_snd], min(self.__fanout, n_r - 1)):
+                other_ranks, min(self.__fanout, n_r - 1)):
                 messages.setdefault(r_rcv, []).append(msg)
 
         # Sanity check prior to forwarding iterations