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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2015/05/29 23:43:17 UTC
[jira] [Updated] (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 ]
Davies Liu updated SPARK-7956:
------------------------------
Description:
The overhead of current implementation of codegen is to high (100ms - 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).
was:
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).
> 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: Davies Liu
>
> The overhead of current implementation of codegen is to high (100ms - 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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