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From "Gera Shegalov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11506) Configuration.get() is unnecessarily slow
Date Thu, 29 Jan 2015 21:24:36 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14297703#comment-14297703
] 

Gera Shegalov commented on HADOOP-11506:
----------------------------------------

Can you review this patch, [~andrew.wang]?

> Configuration.get() is unnecessarily slow
> -----------------------------------------
>
>                 Key: HADOOP-11506
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11506
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Dmitriy V. Ryaboy
>            Assignee: Gera Shegalov
>         Attachments: HADOOP-11506.001.patch, HADOOP-11506.002.patch
>
>
> Profiling several large Hadoop jobs, we discovered that a surprising amount of time was
spent inside Configuration.get, more specifically, in regex matching caused by the substituteVars
call.



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