HyukjinKwon commented on a change in pull request #23739:
[SPARK-26832][SQL][PYTHON] Avoid project creation per record at Python's
grouped vectorized UDF
URL: https://github.com/apache/spark/pull/23739#discussion_r254538215
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/FlatMapGroupsInPandasExec.scala
##########
@@ -145,7 +145,8 @@ case class FlatMapGroupsInPandasExec(
sessionLocalTimeZone,
pythonRunnerConf).compute(grouped, context.partitionId(), context)
-
columnarBatchIter.flatMap(_.rowIterator.asScala).map(UnsafeProjection.create(output,
output))
Review comment:
D'oh! yes. It was my mistake.
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