Github user Krimit commented on a diff in the pull request:
https://github.com/apache/spark/pull/17673#discussion_r113599808
--- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
---
@@ -194,6 +232,285 @@ final class Word2Vec @Since("1.4.0") (
@Since("1.4.1")
override def copy(extra: ParamMap): Word2Vec = defaultCopy(extra)
+
+ /**
+ * Similar to InitUnigramTable in the original code. Instead of using an
array of size 100 million
+ * like the original, we size it to be 20 times the vocabulary size.
--- End diff --
why 20 times the vocabulary size? Also, this comment is misplaced. It
belongs with the ``unigramTableSizeFactor``
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