Tom Voros created LOG4NET-421:
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Summary: Inclusion of UserName in composite properties dictionary
has a significant performance impact
Key: LOG4NET-421
URL: https://issues.apache.org/jira/browse/LOG4NET-421
Project: Log4net
Issue Type: Bug
Components: Core
Affects Versions: 1.2.13
Environment: Issue was observed on Windows Server 2008 R2
Reporter: Tom Voros
A change made for LOG4NET-205 has the LoggingEvent.CreateCompositeProperties
method get the UserName property for every log event. Since getting the
UserName is very slow, this change has a significant impact on performance in
log4net.
In one trace captured with dotTrace on a large web application we found that
the get UserName property (called from CreateCompositeProperties) accounted for
34% of all time spent in log4net code.
Our workaround for the issue has been to "fix" the UserName property by adding
<fix value="32" /> to all our appenders.
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