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https://issues.apache.org/jira/browse/HIVE-22929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17048141#comment-17048141
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Hive QA commented on HIVE-22929:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  1m 
12s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}  2m 17s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-20881/dev-support/hive-personality.sh
 |
| git revision | master / 1fc351b |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-20881/yetus/patch-asflicense-problems.txt
 |
| modules | C: parser U: parser |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-20881/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Performance: quoted identifier parsing uses throwaway Regex via 
> String.replaceAll()
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-22929
>                 URL: https://issues.apache.org/jira/browse/HIVE-22929
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gopal Vijayaraghavan
>            Assignee: Krisztian Kasa
>            Priority: Major
>         Attachments: HIVE-22929.1.patch, HIVE-22929.2.patch, 
> String.replaceAll.png
>
>
>  !String.replaceAll.png! 
> https://github.com/apache/hive/blob/master/parser/src/java/org/apache/hadoop/hive/ql/parse/HiveLexer.g#L530
> {code}
>     '`'  ( '``' | ~('`') )* '`' { setText(getText().substring(1, 
> getText().length() -1 ).replaceAll("``", "`")); }
> {code}



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