avoid unnecessary heap init

smartsim/_core/launcher/dragon/pqueue.py

@@ -81,9 +81,13 @@ def _initialize_reference_counters(self, nodes: t.List[Node]) -> None:
             self._ref_map[node.hostname] = tracking_info
 
             if node.num_gpus:
-                heapq.heappush(self._gpu_refs, tracking_info)
+                self._gpu_refs.append(tracking_info)
             else:
-                heapq.heappush(self._cpu_refs, tracking_info)
+                self._cpu_refs.append(tracking_info)
+
+        # no need to reorder anything during initialization
+        # heapq.heapify(self._gpu_refs)
+        # heapq.heapify(self._cpu_refs)
 
     def increment(self, host: str) -> None:
         """Directly increment the reference count of a given node and ensure the
@@ -191,7 +195,7 @@ def _get_next_available_node(
             if ref_count == 0:
                 # increment the ref count before putting back onto heap
                 tracking_info[0] = ref_count + 1
-            
+
             if tracking_info is not None:
                 heapq.heappush(heap, tracking_info)