Remko Popma commented on LOG4J2-1607:

I can add tests for the non-empty ThreadContext scenarios to 

> Improve performance of SortedStringArrayMap data structure
> ----------------------------------------------------------
>                 Key: LOG4J2-1607
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1607
>             Project: Log4j 2
>          Issue Type: Improvement
>    Affects Versions: 2.7
>            Reporter: Remko Popma
>            Assignee: Remko Popma
> [Performance 
> testing|https://issues.apache.org/jira/browse/LOG4J2-1349?focusedCommentId=15432877&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15432877]
>  for LOG4J2-1349 showed that the SortedArray-based data structure can be 
> copied fast, but its {{get()}} and {{put()}} performance is worse than a 
> hash-based data structure like the JDK HashMap.
> This ticket is to investigate options for improving performance of the 
> {{get()}} operation, since this can impact the performance of Filters and 
> Lookups.

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