[jira] [Commented] (LOG4NET-429) Pattern with Context property causes severe slowdown
[ https://issues.apache.org/jira/browse/LOG4NET-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14017765#comment-14017765 ] Stefan Bodewig commented on LOG4NET-429: Hmm. in that case any patch that tried to generalize laziness would become pretty convoluted. Let's stick with your original patch. > 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/ -- This message was sent by Atlassian JIRA (v6.2#6252)
[jira] [Commented] (LOG4NET-429) Pattern with Context property causes severe slowdown
[ https://issues.apache.org/jira/browse/LOG4NET-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14017739#comment-14017739 ] Dominik Psenner commented on LOG4NET-429: - As far as I can recall, every composite dictionary was flattened at some point when I wrote my patch. > 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/ -- This message was sent by Atlassian JIRA (v6.2#6252)
