On Sat, Sep 22, 2012 at 3:46 PM, Ralph Goers <ralph.go...@dslextreme.com> wrote: > Thank, Ceki. I obviously take your concerns very seriously and will look > into these asap.
Maybe we can push the used configuration/code for the perfomance test to github? That way it is more easy to follow which version has been used and which settings. Cheers > Ralph > > On Sep 22, 2012, at 6:21 AM, ceki wrote: > >> Hello, >> >> Looking at the log4j/log42/logback comparison [1], I have noticed a >> number of inaccuracies. >> >> item 2) The performance of deciding whether to log or not to log when >> logging is turned on. >> >> Logback does not walk the hierarchy. No, really. It doesn't. >> >> item 2) Actually outputting log messages >> >> For the log4j2 figures your have the "immediateFlush" property set to >> false. For the logback figures you have "immediateFlush" property set >> to true. >> >> Quoting from [2] and [3] >> >> By default, the OutputStream is immediately flushed, unless the >> immediateFlush property is explicitly set to 'false'. Setting the >> immediateFlush property to false can significantly improve logging >> throughput. >> >> The default value for immediateFlush is 'true'. Immediate flushing of >> the output stream ensures that logging events are immediately written >> to disk and will not be lost in case your application exits without >> properly closing appenders. On the other hand, setting this property >> to 'false' is likely to quintuple (your mileage may vary) logging >> throughput. As mentioned previously, if immediateFlush is set to >> 'false' and if appenders are not closed properly when your application >> exits, then logging events not yet written to disk may be lost. === >> ==== >> >> For an honest comparison, both frameworks should use comparable >> settings. In this particular case, the setting is called >> "immediateFlush" and carries the same name in both frameworks. >> >> >> [1] http://logging.apache.org/log4j/2.x/performance.html >> [2] http://logback.qos.ch/manual/encoders.html#LayoutWrappingEncoder >> [3] http://logback.qos.ch/manual/encoders.html#immediateFlush >> >> -- >> Ceki >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: log4j-dev-unsubscr...@logging.apache.org >> For additional commands, e-mail: log4j-dev-h...@logging.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: log4j-dev-unsubscr...@logging.apache.org > For additional commands, e-mail: log4j-dev-h...@logging.apache.org > -- http://www.grobmeier.de https://www.timeandbill.de --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-dev-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-dev-h...@logging.apache.org
