liuxian created SPARK-26780:
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Summary: Improve shuffle read using ReadAheadInputStream
Key: SPARK-26780
URL: https://issues.apache.org/jira/browse/SPARK-26780
Project: Spark
Issue Type: Improvement
Components: Shuffle
Affects Versions: 3.0.0
Reporter: liuxian
Using _ReadAheadInputStream_ to improve shuffle read performance.
_ReadAheadInputStream_ can save cpu utilization and almost no performance
regression
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