title: Log4j Performance Wise %F vs getClass().getSimpleName()
body: <p>For performance wise what is better to use to include the class name in the log? In the pattern layout it gives a warning in the documentation for %F saying:</p>
  
  <p><strong>Used to output the file name where the logging request was issued.<br>
  WARNING Generating caller location information is extremely slow and should be avoided unless execution speed is not an issue.</strong></p>