[ https://issues.apache.org/jira/browse/SPARK-28096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yesheng Ma updated SPARK-28096: ------------------------------- Summary: Lazy val performance pitfall in Spark SQL LogicalPlans (was: Performance pitfall in Spark SQL LogicalPlans) > Lazy val performance pitfall in Spark SQL LogicalPlans > ------------------------------------------------------ > > Key: SPARK-28096 > URL: https://issues.apache.org/jira/browse/SPARK-28096 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 3.0.0 > Reporter: Yesheng Ma > Priority: Major > > The original {{references}} and {{validConstraints}} implementations in a few > QueryPlan and Expression classes are methods, which means unnecessary > re-computation can happen at times. This PR resolves this problem by making > these method lazy vals. > We benchmarked this optimization on TPC-DS queries whose planning time is > longer than 1s. In the benchmark, we warmed up the queries 5 iterations and > then took the average of 10 runs. Results showed that this micro-optimization > can improve the end-to-end planning time by 25%. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org