| ConcatVsArray | Measure difference in performance of string concatenation versus creating an anonymous string array. | code | html |
| ListVsVector | Compares the performance of looping through a list versus a Vector. | code | html |
| ListVsVector.Chain | code | html | |
| Logging | Measure the performance of logging. | code | html |
| NOPWriter | Extends Writer with methods that return immediately without doing anything. |
code | html |
| NewVsSetLen | This program compares the cost of creating a new StringBuffer and converting it to a String versus keeping the same StringBuffer, setting its size to zero and then converting it to String. | code | html |
| NotLogging | Measure the performance of evaluating whether to log or not to log, but not actually logging. | code | html |
| NullAppender | A bogus appender which calls the format method of its layout object but does not write the result anywhere. | code | html |
| SystemTime | Measures the time required to make a System.currentTimeMillis() and Thread.currentThread().getName() calls. | code | html |
Package to measure the performance of the different log4j components.
The
org.apache.log4j.performance package is intended
for internal use only. Consequently, the classes in this
package are not included in the log4j.jar file.