[ https://issues.apache.org/jira/browse/SPARK-21781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-21781: ------------------------------------ Assignee: (was: Apache Spark) > Modify DataSourceScanExec to use concrete ColumnVector type. > ------------------------------------------------------------ > > Key: SPARK-21781 > URL: https://issues.apache.org/jira/browse/SPARK-21781 > Project: Spark > Issue Type: Improvement > Components: SQL > Affects Versions: 2.3.0 > Reporter: Takuya Ueshin > > As mentioned at > https://github.com/apache/spark/pull/18680#issuecomment-316820409, when we > have more {{ColumnVector}} implementations, it might (or might not) have huge > performance implications because it might disable inlining, or force virtual > dispatches. > As for read path, one of the major paths is the one generated by > {{ColumnBatchScan}}. Currently it refers {{ColumnVector}} so the penalty will > be bigger as we have more classes, but we can know the concrete type from its > usage, e.g. vectorized Parquet reader uses {{OnHeapColumnVector}}. We can use > the concrete type in the generated code directly to avoid the penalty. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org