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