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