Markus Spann created LOG4J2-3115:
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Summary: Remember previously computed strings in
NamePatternConverter
Key: LOG4J2-3115
URL: https://issues.apache.org/jira/browse/LOG4J2-3115
Project: Log4j 2
Issue Type: Improvement
Components: Core
Reporter: Markus Spann
Implementations of {{NamePatternConverter}} are responsible for abbreviating
logger and class names according to a configured pattern.
Abbreviation can be quite complex and computationally expensive (consider
abbreviating x parts of a fully qualified class name to y number of leftmost
characters).
Example: The pattern {{%logger\{1.}}} abbreviates logger name
{{org.apache.logging.log4j.core.pattern.NameAbbreviator}} to
{{o.a.l.l.c.p.NameAbbreviator}}
The strings to abbreviate (logger and class names) are extremely likely stem
from a limited set of candidates. I would like suggest that results are cached
in a map to prevent computation over and over again e.g. in every log statement
of a logger.
I have a small patch ready that addresses the issue.
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