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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/05/29 23:26:17 UTC

[jira] [Assigned] (SPARK-7956) Use Janino to compile SQL expression

     [ https://issues.apache.org/jira/browse/SPARK-7956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-7956:
-----------------------------------

    Assignee: Apache Spark  (was: Davies Liu)

> Use Janino to compile SQL expression
> ------------------------------------
>
>                 Key: SPARK-7956
>                 URL: https://issues.apache.org/jira/browse/SPARK-7956
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Davies Liu
>            Assignee: Apache Spark
>
> The overhead of current implementation of codegen is to high (50ms - 500ms), which blocks us from turning it on by default.
> We should try to investigate using Janino to compile the SQL expressions into JVM bytecode, which should be much faster to compile (about 10ms).



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