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https://issues.apache.org/jira/browse/SPARK-26153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16696368#comment-16696368
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Apache Spark commented on SPARK-26153:
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User 'zhengruifeng' has created a pull request for this issue:
https://github.com/apache/spark/pull/23123
> 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
> Priority: Minor
>
> We can directly obtain \{numFeatures} from the base models
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