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https://issues.apache.org/jira/browse/LOG4NET-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16042881#comment-16042881
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ASF GitHub Bot commented on LOG4NET-429:
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Github user dpsenner commented on the issue:
https://github.com/apache/logging-log4net/pull/5
The patches available as attachments on issue LOG4NET-429 look more
sensible to me. This patch simply removes this feature and thus breaks current
behavior. In my eyes this is not a great deal.
> Pattern with Context property causes severe slowdown
> ----------------------------------------------------
>
> Key: LOG4NET-429
> URL: https://issues.apache.org/jira/browse/LOG4NET-429
> Project: Log4net
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.2.13
> Reporter: Jonas Versén
> Assignee: Dominik Psenner
> Priority: Minor
> Labels: performance
> Attachments: LOG4NET-429-alternative.patch, LOG4NET-429.patch
>
>
> If you use a context property in your appenders pattern, there will be a
> significant logging slowdown. In my experience anywhere from 3 to 5 times
> slower (this will depend on the appender).
> I believe that as soon as you use a context property log4net will internally
> access the windows user name even though it's not the property you want to
> access. This theory comes from the fact that printing all properties in the
> pattern (including the costly property username) compared to just printing
> one will slow down the logging with the same factor.
> I've made a stackoverflow question with more details as well
> http://stackoverflow.com/questions/22612286/using-log4net-context-properties-has-negative-impact-on-performance/
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