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https://issues.apache.org/jira/browse/SPARK-7956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin updated SPARK-7956:
-------------------------------
Issue Type: Sub-task (was: Improvement)
Parent: SPARK-7075
> Use Janino to compile SQL expression
> ------------------------------------
>
> Key: SPARK-7956
> URL: https://issues.apache.org/jira/browse/SPARK-7956
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
> Fix For: 1.5.0
>
>
> 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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