zhengruifeng created SPARK-27787:
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Summary: Eliminate uncessary job to compute SSreg
Key: SPARK-27787
URL: https://issues.apache.org/jira/browse/SPARK-27787
Project: Spark
Issue Type: Improvement
Components: ML
Affects Versions: 3.0.0
Reporter: zhengruifeng
in {{RegressionMetrics}}, a job is needed to compute SSreg
However, we only need to agg summary of column prediction, then SSreg can be
computed directly based on the summary.
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