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Posted to log4net-dev@logging.apache.org by "Jonas Versén (JIRA)" <ji...@apache.org> on 2014/03/25 08:18:42 UTC

[jira] [Created] (LOG4NET-429) Pattern with Context property causes severe slowdown

Jonas Versén created LOG4NET-429:
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             Summary: 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: Appenders
    Affects Versions: 1.2.13
            Reporter: Jonas Versén
            Priority: Minor


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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