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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5696) change default compiler strategy
Date Mon, 31 Jul 2017 22:17:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108069#comment-16108069
] 

Jinfeng Ni commented on DRILL-5696:
-----------------------------------

Can you provide more specific detail about the comparison you did? What agg expression do
you use in your query? What is the compile time with JDK 8 / Janino, respectively?  What is
the execution time for the agg operator? Those detail will give people clearer idea whether
we should set JDK 8 as the default compiler. 


> change default compiler strategy
> --------------------------------
>
>                 Key: DRILL-5696
>                 URL: https://issues.apache.org/jira/browse/DRILL-5696
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Codegen
>    Affects Versions: 1.9.0, 1.10.0, 1.11.0
>            Reporter: weijie.tong
>
> at our production ,when we have more than 20 agg expression, the  compile time is high
using the default janino.  but when changed to  jdk compiler,we gain fewer compile time than
the janino one. Our product jdk version is 1.8. 
> So the default one should be JDK , if user's jdk version is upper than 1.7. We should
add another check condition to the ClassCompilerSelector.



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