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https://issues.apache.org/jira/browse/LUCENE-5372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13852727#comment-13852727
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Uwe Schindler commented on LUCENE-5372:
---------------------------------------
his one is wanted, but mostly obsolete - maybe put on exclusion list:
{noformat}
[forbidden-apis] Forbidden class/interface use: java.lang.StringBuffer [Use
StringBuilder instead, which has no synchronization]
[forbidden-apis] in
org.apache.lucene.analysis.tokenattributes.CharTermAttributeImpl
(CharTermAttributeImpl.java:148)
{noformat}
> IntArray toString has O(n^2) performance
> ----------------------------------------
>
> Key: LUCENE-5372
> URL: https://issues.apache.org/jira/browse/LUCENE-5372
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Reporter: Joshua Hartman
> Assignee: Dawid Weiss
> Priority: Minor
> Fix For: 5.0, 4.7
>
> Attachments: 5372.patch, LUCENE-5372-forbidden.patch
>
>
> This is pretty minor, but I found a few issues with the toString
> implementations while looking through the facet data structures.
> The most egregious is the use of string concatenation in the IntArray class.
> I have fixed that using StringBuilders. I also noticed that other classes
> were using StringBuffer instead of StringBuilder. According to the javadoc,
> "This class is designed for use as a drop-in replacement for StringBuffer in
> places where the string buffer was being used by a single thread (as is
> generally the case). Where possible, it is recommended that this class be
> used in preference to StringBuffer as it will be faster under most
> implementations."
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