[jira] Commented: (MIME4J-174) Refactor org.mime4j.util.CharsetUtil to lazily determine supported encodings/decodings

["Stefano Bagnara (JIRA)" <mi...@james.apache.org>]

    [ https://issues.apache.org/jira/browse/MIME4J-174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12841528#action_12841528 ] 

Stefano Bagnara commented on MIME4J-174:
----------------------------------------

Forgot to say that patches are welcome :-)

> Refactor org.mime4j.util.CharsetUtil to lazily determine supported encodings/decodings
> --------------------------------------------------------------------------------------
>
>                 Key: MIME4J-174
>                 URL: https://issues.apache.org/jira/browse/MIME4J-174
>             Project: JAMES Mime4j
>          Issue Type: Improvement
>            Reporter: Richard von Keyserling
>
> On initialization CharsetUtil determines all supported endcodings and decodings by attempting to encode and decode a dummy string with every entry in JAVA_CHARSETS.   This loads a lot of classes into the JVM which in turn uses up a lot of permGen.   
> Moving the decoding and encoding tests into isDecodingSupported() and isEncodingSupported() and adding positive results to the decodingSupported and encodingSupported treeSets from those methods would allow the class to only load encoders and decoders the application needs. 

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