[ https://issues.apache.org/jira/browse/SPARK-27607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-27607: ------------------------------------ Assignee: Apache Spark > Improve performance of Row.toString() > ------------------------------------- > > Key: SPARK-27607 > URL: https://issues.apache.org/jira/browse/SPARK-27607 > Project: Spark > Issue Type: Improvement > Components: SQL > Affects Versions: 2.4.0 > Reporter: Josh Rosen > Assignee: Apache Spark > Priority: Minor > > I have a job which ends up calling {{org.apache.spark.sql.Row.toString}} on > every row in a massive dataset (the reasons for this are slightly odd and > it's a bit non-trivial to change the job to avoid this step). > {{Row.toString}} is implemented by first constructing a WrappedArray > containing the Row's values (by calling {{toSeq}}) and then turning that > array into a string with {{mkString}}. We might be able to get a small > performance win by pipelining these steps, using an imperative loop to append > fields to a StringBuilder as soon as they're retrieved (thereby cutting out a > few layers of Scala collections indirection). -- 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