static double ComplexMessage(Category category,
    long runLength) 
{
    long before = System.currentTimeMillis();
    for(int i = 0; i <  runLength; i++) {
      category.debug("Message" + i +
		" bottles of beer standing on the wall.");
    }
    return (System.currentTimeMillis() - before)*1000.0/runLength;
}

 static double FullyOptimizedComplexMessage(Category category,
    long runLength) 
{
    long before = System.currentTimeMillis();
    for(int i = 0; i <  runLength; i++) {
      if(category.isDebugEnabled())
	category.debug("Message" + i +
		  " bottles of beer standing on the wall.");
    }
    return (System.currentTimeMillis() - before)*1000.0/runLength;
}

 static  void ProgramInit(String[] args) 
{
    try {
      runLength = Integer.parseInt(args[1]);
    }
    catch(java.lang.NumberFormatException e) {
      System.err.println(e);
      Usage();
    }
    ConsoleAppender appender = new ConsoleAppender(new SimpleLayout());
    if("false".equals(args[0])) {
      // nothing to do
    } else if ("true".equals(args[0])) {
      System.out.println("Flagging as shipped code.");
      Category.getDefaultHierarchy().setThreshold((Level) Level.WARN);
    } else
      Usage();
    SHORT_CAT.setLevel((Level) Level.INFO);
    Category.getRoot().setLevel((Level) Level.INFO);
}

Program wide initialization method.

 static double SimpleMessage(Category category,
    String msg,
    long runLength) 
{
    long before = System.currentTimeMillis();
    for(int i = 0; i <  runLength; i++) {
      category.debug(msg);
    }
    return (System.currentTimeMillis() - before)*1000.0/runLength;
}

 static  void Usage() 
{
  
    System.err.println(
      "Usage: java org.apache.log4j.test.NotLogging true|false runLength\n" +
      "true indicates shipped code, false indicates code in development" +
      "  where runLength is an int representing the run length of loops\n"+
      "We suggest that runLength be at least 100'000.");
    System.exit(1);
}

 public static  void main(String[] argv) 
{
    if(argv.length != 2) {
      Usage();
    }
    ProgramInit(argv);
    double delta;
    System.out.println();
    for(int i = 0; i <  CAT_ARRAY.length; i++) {
      delta = SimpleMessage(CAT_ARRAY[i], SHORT_MSG, runLength);
      System.out.println("Simple argument,          " + delta
			 + " micros. Cat: " + CAT_ARRAY[i].getName());
    }
    System.out.println();
    for(int i = 0; i <  CAT_ARRAY.length; i++) {
      delta = FullyOptimizedComplexMessage(CAT_ARRAY[i], runLength);
      System.out.println("Fully optimized complex,  " + delta +
			 " micros. Cat: " + CAT_ARRAY[i].getName());
    }
    System.out.println();
    for(int i = 0; i <  CAT_ARRAY.length; i++) {
      delta = ComplexMessage(CAT_ARRAY[i], runLength);
      System.out.println("Complex message argument, " + delta +
			 " micros. Cat: " + CAT_ARRAY[i].getName());
    }
}