cloud-fan commented on a change in pull request #28105: [SPARK-31316][SQL]
SQLQueryTestSuite: Display the total generate time for generated java code.
URL: https://github.com/apache/spark/pull/28105#discussion_r402906375
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/WholeStageCodegenExec.scala
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@@ -567,6 +567,26 @@ object WholeStageCodegenExec {
def isTooManyFields(conf: SQLConf, dataType: DataType): Boolean = {
numOfNestedFields(dataType) > conf.wholeStageMaxNumFields
}
+
+ // The whole stage codegen generates java code on the driver side and sends
it to the Executor
+ // side for execution after compilation. The whole codegen can bring
significant performance
+ // improvements in large data and distributed environments. However, in the
test environment,
+ // due to the small amount of data, the time to generate Java code takes up
a major part of the
+ // entire runtime. So we summarize the total generation time and output it
to the execution log
Review comment:
`total code generation time`
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