zhengruifeng commented on code in PR #50013:
URL: https://github.com/apache/spark/pull/50013#discussion_r1970735576
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mllib/src/main/scala/org/apache/spark/ml/classification/FMClassifier.scala:
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@@ -235,6 +236,13 @@ class FMClassifier @Since("3.0.0") (
model.setSummary(Some(summary))
}
+ override def estimateModelSize(dataset: Dataset[_]): Long = {
+ val numFeatures = DatasetUtils.getNumFeatures(dataset, $(featuresCol))
Review Comment:
DatasetUtils.getNumFeatures is quite cheap, it will try to fetch
`numFeatures` from the metadata, and if there is no such metadata, it just
infer the `numFeatures` from the first row.
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