/**************************************************************************
/* Performance-measurement for dynamic method-invocation using reflection
/*
/* Copyright (c) 2004 by Bernhard Bablok (mail@bablokb.de)
/*
/* This program is free software; you can redistribute it and/or modify
/* it under the terms of the GNU General Public License as published
/* by  the Free Software Foundation; either version 2 of the License or
/* (at your option) any later version.
/*
/* This program is distributed in the hope that it will be useful, but
/* WITHOUT ANY WARRANTY; without even the implied warranty of
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
/* GNU General Public License for more details.
/*
/* You should have received a copy of the GNU General Public License
/* along with this program; see the file COPYING.  If not, write to
/* the Free Software Foundation Inc., 59 Temple Place - Suite 330,
/* Boston, MA  02111-1307 USA
/**************************************************************************/

import java.lang.reflect.*;

/**
     Performance-measurement for dynamic method-invocation using reflection

   @version $Revision: 1.1 $
   @author  $Author: bablokb $
*/

public class DynPerf {

  //////////////////////////////////////////////////////////////////////////////

  /**
     Main entry point.

     @param args Commandline arguments (ignored).
  */
  
  public static void main(String[] args) {
    try {
      DynPerf mc = new DynPerf();
      double i;

      long t1 = System.currentTimeMillis();
      for (i=1;i<100000;++i)
	Math.max(i,i+1);
      long t2 = System.currentTimeMillis();
     
      Class[] types = new Class[2];
      types[0] = Double.TYPE;
      types[1] = Double.TYPE;
      Method m = Math.class.getDeclaredMethod("max",types);
      Double[] arguments = new Double[2];

      long t3 = System.currentTimeMillis();
      for (i=1;i<100000;++i) {
	arguments[0] = new Double(i);
	arguments[1] = new Double(i+1);
	m.invoke(null,arguments);
      }
      long t4 = System.currentTimeMillis();
      System.out.println("direct:  " + (t2-t1) + "msec" +
                       "\ndynamic: " + (t4-t3) + "msec\n");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}