Performance Tricks for C# Logging

Posted by Charles on Stack Overflow See other posts from Stack Overflow or by Charles
Published on 2010-04-12T02:50:26Z Indexed on 2010/04/12 2:53 UTC
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c#

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logging

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Performance

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design

I am looking into C# logging and I do not want my log messages to spend any time processing if the message is below the logging threshold. The best I can see log4net does is a threshold check AFTER evaluating the log parameters.

Example:

_logger.Debug( "My complicated log message " + thisFunctionTakesALongTime() + " will take a long time" )

Even if the threshold is above Debug, thisFunctionTakesALongTime will still be evaluated.

In log4net you are supposed to use _logger.isDebugEnabled so you end up with

if( _logger.isDebugEnabled )
    _logger.Debug( "Much faster" )

I want to know if there is a better solution for .net logging that does not involve a check each time I want to log.

In C++ I am allowed to do

LOG_DEBUG( "My complicated log message " + thisFunctionTakesALongTime() + " will take no time" )

since my LOG_DEBUG macro does the log level check itself. This frees me to have a 1 line log message throughout my app which I greatly prefer. Anyone know of a way to replicate this behavior in C#?

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