Xi Lyu created SPARK-52450:
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Summary: Improve performance of schema deepcopy
Key: SPARK-52450
URL: https://issues.apache.org/jira/browse/SPARK-52450
Project: Spark
Issue Type: Improvement
Components: Connect
Affects Versions: 4.0.0, 4.1.0, 4.0.1
Reporter: Xi Lyu
In Spark Connect, `DataFrame.schema` returns a deep copy of the schema to
prevent unexpected behavior caused by user modifications to the returned schema
object. However, if a user accesses `df.schema` repeatedly on a DataFrame with
a complex schema, it can lead to noticeable performance degradation.
Since `deepcopy` is already known for its performance overhead, we should
consider using an alternative serialization/deserialization (ser/de) method to
improve the efficiency of accessing `df.schema`.
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