[logback-user] logback console appender slow on windows xp

ceki ceki at qos.ch
Wed Dec 21 17:53:10 CET 2011

Thank you for the output of visualvm profiler. It looks like 90.4% of 
the time is spent in java.io.PrintStream.write(int) called by 
ch.qos.logback.core.joran.spi.ConsoleTarget. There is also some time 
spent in java.io.IOException.<init>(String), i.e the constructor of 

In principle, the performance of log4j ConsoleAppender should be very 
similar, although its execution path might be slightly shorter.

Which version of log4j are you using?


On 21.12.2011 16:04, Peter Kullmann wrote:
> I don't know what to do except perhaps warn against the usage of the console appender when running without a console on windows xp.
> I'm attaching the output of the visualvm profiler so that you can see where all the time is being spent.
> By the way, I think log4j doesn't have this problem. We were using log4j for years in much the same setups.
> Peter
> Am 21.12.2011 um 11:03 schrieb ceki:
>> On 21.12.2011 10:55, Peter Kullmann wrote:
>>> Hi Ceki,
>>> The problem manifests itself under windows xp. Windows 7 is much better.
>> I don't see anything actionable to work with here. Ideas?
>>> Peter

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