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https://issues.apache.org/jira/browse/HIVE-19661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16863559#comment-16863559
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Ashutosh Chauhan commented on HIVE-19661:
-----------------------------------------

[~alangates] Can you please help with License? I am not sure if license 
permissible for it to be included?
[~Rajkumar Singh] Why not turn it on by default. Perf gains are impressive.

> switch Hive UDFs to use Re2J regex engine
> -----------------------------------------
>
>                 Key: HIVE-19661
>                 URL: https://issues.apache.org/jira/browse/HIVE-19661
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Rajkumar Singh
>            Assignee: Rajkumar Singh
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-19661.01.patch, HIVE-19661.02.patch, 
> HIVE-19661.03.patch, HIVE-19661.patch
>
>
> Java regex engine can be very slow in some cases e.g. 
> https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8203458



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