Github user MaxGekk commented on a diff in the pull request:
https://github.com/apache/spark/pull/21913#discussion_r207737517
--- Diff: core/src/main/scala/org/apache/spark/util/ThreadUtils.scala ---
@@ -254,4 +258,58 @@ private[spark] object ThreadUtils {
executor.shutdownNow()
}
}
+
+ /**
+ * Transforms input collection by applying the given function to each
element in parallel fashion.
--- End diff --
I added a comment about this.
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