zhengruifeng created SPARK-30354:
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Summary: GBT reuse DecisionTreeMetadata among iterations
Key: SPARK-30354
URL: https://issues.apache.org/jira/browse/SPARK-30354
Project: Spark
Issue Type: Improvement
Components: ML
Affects Versions: 3.0.0
Reporter: zhengruifeng
For each tree in GBT, it will build a {{DecisionTreeRegressionModel}} by
{{DecisionTreeRegressor}}, which will first calculate the
{{DecisionTreeMetadata}} over the whole dataset.
However, this {{DecisionTreeMetadata}} can be reused for all trees.
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