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https://issues.apache.org/jira/browse/LANG-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15567995#comment-15567995
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Bruno P. Kinoshita commented on LANG-1238:
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>It would be good to first identify how many methods we are talking about here.

Here's what I could find (6) searching in Eclipse for 'regular' and 'regex' in 
StringUtils:

- removeAll(:String, :String)
- removeFirst(:String, :String)
- replacePattern(:String, :String, :String)
- removePattern(:String, :String)
- replaceAll(:String, :String, :String)
- replaceFirst(:String, :String, :String)

> Overload Operations in StringUtils that take a regex to take precompiled 
> Pattern
> --------------------------------------------------------------------------------
>
>                 Key: LANG-1238
>                 URL: https://issues.apache.org/jira/browse/LANG-1238
>             Project: Commons Lang
>          Issue Type: Improvement
>          Components: lang.*
>    Affects Versions: 3.4
>            Reporter: Christopher Cordeiro
>            Priority: Minor
>
> For performance reasons, it would be nice if the operations in StringUtils 
> that take a regular expression (removePattern/replacePattern) were overloaded 
> to optionally take a precompiled Pattern.



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