XD-DENG commented on a change in pull request #13449:
URL: https://github.com/apache/airflow/pull/13449#discussion_r551008494
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File path: airflow/models/dag.py
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@@ -361,8 +361,7 @@ def __repr__(self):
return f"<DAG: {self.dag_id}>"
def __eq__(self, other):
- if type(self) == type(other) and self.dag_id == other.dag_id:
-
+ if type(self) == type(other):
Review comment:
That optimisation may not make sense given two reasons below:
- `all()` function has the "exit fast" property, i.e., whenever there is any
`False` element, it will return `False` immediately, rather than traversing all
elements in the iterable.
[reference](https://docs.python.org/3/library/functions.html#all)
- For `dag` model, `dag_id` is the 1st element in `_comps`; For
`BaseOperator`, `task_id` is the 1st element in `_comps`.
So after the change I make here, there should be zero impact on the
performance (actually it improves the performance very minorly: it helps avoid
comparing `dag_id` in `dag` model's `__eq__`for two times. Similar for
`BaseOperator`).
Kindly let me know if it makes sense to you?
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