zhengruifeng created SPARK-26153:
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Summary: GBT & RandomForest avoid unnecessary `first` job to
compute `numFeatures`
Key: SPARK-26153
URL: https://issues.apache.org/jira/browse/SPARK-26153
Project: Spark
Issue Type: Improvement
Components: ML
Affects Versions: 3.0.0
Reporter: zhengruifeng
We can directly obtain \{numFeatures} from the base models
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