[jira] [Created] (LOG4J2-1575) (GC) Store Configuration Properties in List instead of Map to prevent creating temporary iterators

["Remko Popma (JIRA)" <ji...@apache.org>]

Remko Popma created LOG4J2-1575:
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             Summary: (GC) Store Configuration Properties in List instead of Map to prevent creating temporary iterators
                 Key: LOG4J2-1575
                 URL: https://issues.apache.org/jira/browse/LOG4J2-1575
             Project: Log4j 2
          Issue Type: Improvement
          Components: Lookups
    Affects Versions: 2.6.2
            Reporter: Remko Popma
            Assignee: Remko Popma
             Fix For: 2.7


Currently the Configuration stores Property values in a Map, where the key is the Property, and the value is a Boolean specifying whether the value contains a "${", meaning it requires a string substitution.

This is not a huge problem, but if the configuration contains properties, the Map is iterated over for each event, creating a number of temporary objects.

I propose to store the boolean value in the Property class itself (to be initialized in the constructor). This allows the Configuration to store Property values in an immutable List, which can be iterated over without creating temporary objects. 



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