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From "Chunhui Shi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5696) change default compiler strategy
Date Tue, 01 Aug 2017 18:39:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16109482#comment-16109482
] 

Chunhui Shi commented on DRILL-5696:
------------------------------------

Kunal, can you help looking at the compilation time of large queries with JDK7/8 and Janin's
performance issue? Also we need to measure the efficiency of generated code before making
decision.

> 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
>            Assignee: Kunal Khatua
>
> 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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