uranusjr commented on code in PR #33934:
URL: https://github.com/apache/airflow/pull/33934#discussion_r1311097068


##########
airflow/models/dag.py:
##########
@@ -1699,7 +1699,7 @@ def _get_task_instances(
         if include_subdags:
             # Crafting the right filter for dag_id and task_ids combo
             conditions = []
-            for dag in self.subdags + [self]:
+            for dag in [*self.subdags, self]:

Review Comment:
   A big chunk of this would come from `import itertools` though, which would 
not be relevant in Airflow since the module is already imported in a lot of 
places. I would not be surprised if `*` is still best for small lists though, 
since the itertools version still needs to build an additional list (of a 
single item).



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