Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11741#discussion_r56770737
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/BufferedRowIterator.java
---
@@ -34,6 +34,7 @@
protected LinkedList<InternalRow> currentRows = new LinkedList<>();
// used when there is no column in output
protected UnsafeRow unsafeRow = new UnsafeRow(0);
+ private long startTimeMs = System.currentTimeMillis();
--- End diff --
we should use nanoTime. See
https://github.com/databricks/scala-style-guide#misc_currentTimeMillis_vs_nanoTime
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