Github user willb commented on a diff in the pull request: https://github.com/apache/spark/pull/15150#discussion_r79600882 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala --- @@ -580,7 +581,11 @@ class Word2VecModel private[spark] ( ind += 1 } - val scored = wordList.zip(cosVec).toSeq.sortBy(-_._2) + val pq = new BoundedPriorityQueue[(String, Double)](num + 1)(Ordering.by(_._2)) + + pq ++= wordList.zip(cosVec) + + val scored = pq.toSeq.sortBy(-_._2) val filtered = wordOpt match { case Some(w) => scored.take(num + 1).filter(tup => w != tup._1) --- End diff -- Thanks, @hhbyyh!
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