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https://issues.apache.org/jira/browse/LOG4J2-1365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15240959#comment-15240959
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Remko Popma commented on LOG4J2-1365:
-------------------------------------

I suspect that the cost of the copy done by {{formatTo(StringBuilder)}} is 
nothing compared to the cost of {{JsonUtils.quoteAsString}} but please prove me 
wrong. Can you show what the performance gain would be?

> Add CharSequenceFormattable interface for Messages to improve performance of 
> Layouts
> ------------------------------------------------------------------------------------
>
>                 Key: LOG4J2-1365
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1365
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: Layouts
>    Affects Versions: 2.5
>            Reporter: Mikael Ståldal
>            Assignee: Mikael Ståldal
>            Priority: Minor
>
> {code}
> public interface CharSequenceFormattable {
>     CharSequence getFormattedCharSequence();
> }
> {code}
> This can be implemented by Messages where it makes sense and used by Layouts 
> where it makes sense.



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