Cheng Su created SPARK-35241: -------------------------------- Summary: Investigate to prefer vectorized hash map in hash aggregate selectively Key: SPARK-35241 URL: https://issues.apache.org/jira/browse/SPARK-35241 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 3.2.0 Reporter: Cheng Su
In hash aggregate, we always use row-based hash map as first level hash map in production, and use vectorized hash map in testing / benchmarking. However we do find in micro-benchmark that vectorized hash map is better than row-based hash map e.g. with single key - [https://github.com/apache/spark/pull/32357#discussion_r620914345] . So we should re-evaluate the decision to always use row-based hash map or not. And maybe come up with a more adaptive decision policy to choose which map to use depending on keys / values. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org