zhengruifeng created SPARK-19054:
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Summary: Eliminate extra pass in NB
Key: SPARK-19054
URL: https://issues.apache.org/jira/browse/SPARK-19054
Project: Spark
Issue Type: Improvement
Components: ML
Reporter: zhengruifeng
Priority: Minor
{{val numClasses = getNumClasses(dataset)}} in {{NaiveBayes}} are used to check
the length of thresholds only when {{positiveLabel && isDefined(thresholds)}}
is true.
In the case that {{positiveLabel}} is true and {{isDefined(thresholds)}} is
false, we don't need to calculate {{getNumClasses}} which may cause a pass on
the whole data.
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