Maxim Gekk created SPARK-29171:
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Summary: Performance regression in Parquet MR on scans of 100
columns
Key: SPARK-29171
URL: https://issues.apache.org/jira/browse/SPARK-29171
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Maxim Gekk
The updated benchmark results show performance regression more than 4 times in
Parquet MR on scanning 100 columns, see
https://github.com/apache/spark/pull/25828/files#diff-e37c3433287c7371ff9c2404db821095R248
. Need to find out the root cause of this and fix it.
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