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https://issues.apache.org/jira/browse/XALANC-647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12513635
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David Bertoni commented on XALANC-647:
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Since the buffer size is defined by an enum within the class definition, I 
think the risk is low.  I can add a comment to the enum to indicate that it 
cannot be reduced below the length of the longest possible numeric character 
reference.

> XalanOtherEncodingWriter::writeNumericCharacterReference() is inefficient
> -------------------------------------------------------------------------
>
>                 Key: XALANC-647
>                 URL: https://issues.apache.org/jira/browse/XALANC-647
>             Project: XalanC
>          Issue Type: Bug
>    Affects Versions: CurrentCVS
>            Reporter: David Bertoni
>            Assignee: David Bertoni
>         Attachments: patch.diff
>
>
> This function formats a numeric character reference for any character that is 
> not representable in the code page.  However, it uses the write() function to 
> write the numeric character reference, which will then check each character 
> to see if it can be represented in the local code page.  This is unnecessary, 
> since the characters in a numeric character reference must be representable.

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