Eric Liang created SPARK-18679:
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Summary: Regression in file listing performance
Key: SPARK-18679
URL: https://issues.apache.org/jira/browse/SPARK-18679
Project: Spark
Issue Type: Bug
Reporter: Eric Liang
Priority: Blocker
In Spark 2.1 ListingFileCatalog was significantly refactored (and renamed to
InMemoryFileIndex).
It seems there is a performance regression here where we no longer performance
listing in parallel for the non-root directory. This forces file listing to be
completely serial when resolving datasource tables that are not backed by an
external catalog.
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