caoxuewen created SPARK-24999:
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Summary: Reduce unnecessary 'new' memory operations
Key: SPARK-24999
URL: https://issues.apache.org/jira/browse/SPARK-24999
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.0
Reporter: caoxuewen
This PR is to solve the CodeGen code generated by fast hash, and there is no
need to apply for a block of memory for every new entry, because unsafeRow's
memory can be reused.
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