L. C. Hsieh created SPARK-56642:
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Summary: Add pipelined JVM-Python UDF data transfer
Key: SPARK-56642
URL: https://issues.apache.org/jira/browse/SPARK-56642
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 4.2.0
Reporter: L. C. Hsieh
The current single-threaded NIO selector model serializes input and reads
output in the same thread alternately. For multi-column UDFs or compute-heavy
UDFs, this leaves the JVM idle while waiting for Python output. We can add
pipelined mode overlaps serialization with output reading to improve throughput.
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