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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