Measuring Performance Using Perf4j Library

package com.sandeep.perf4j.test;
 
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
import org.perf4j.StopWatch;
import org.perf4j.log4j.Log4JStopWatch;
 
public class Perf4jDemo {
 
 private static final Logger logger = Logger.getLogger(Perf4jDemo.class);
  
 public static void main(String[] args) {
   
  BasicConfigurator.configure();
 
  StopWatch watch = new Log4JStopWatch();
   
  logger.info("start time : "+watch.getStartTime());
   
   
     try {
       
   Thread.sleep((long)(Math.random() * 1000L));
    
  } catch (InterruptedException e) {
    
   logger.error("InterruptedException : "+e);
  }
     
   
  logger.info("Elapsed Time : "+ watch.getElapsedTime());
   
  logger.info("Stop Time : "+watch.stop());
 }
}