Liang-Chi Hsieh created SPARK-21717:
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Summary: Decouple the generated codes of consuming rows in
operators under whole-stage codegen
Key: SPARK-21717
URL: https://issues.apache.org/jira/browse/SPARK-21717
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Liang-Chi Hsieh
It has been observed in SPARK-21603 that whole-stage codegen suffers
performance degradtion, if generated functions are too long to be optimized by
JIT.
We basically produce a single function to incorporate generated codes from all
physical operators in whole-stage. Thus, it is possibly to grow the size of
generated function over a threshold that we can't have JIT optimization for it
anymore.
This ticket is trying to decouple the logic of consuming rows in physical
operators to avoid a giant function processing rows.
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