/*
 *  PHEX - The pure-java Gnutella-servent.
 *  Copyright (C) 2001 - 2005 Phex Development Group
 *
 *  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; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Created on 17.02.2005
 *  --- CVS Information ---
 *  $Id$
 */
package phex.test.performance;

import java.nio.ByteBuffer;

import junit.framework.TestCase;

/**
 *
 */
public class TestByteBuffer extends TestCase
{
    int SIZE = 200 * 1024 * 1024;
    public void testArrayMemUsage()
        throws Exception
    {
        long start, beforeT, afterT, end;
        int i;
        ByteBuffer buffer, buffer2;
        start = System.currentTimeMillis();
        beforeT = Runtime.getRuntime().totalMemory();
        byte[] arr = new byte[ SIZE ];
        afterT = Runtime.getRuntime().totalMemory();
        end = System.currentTimeMillis();
        System.out.println( afterT - beforeT );
        System.out.println( end - start );
        i = arr.length;
        
        Thread.sleep(1000 * 20);
        
        start = System.currentTimeMillis();
        beforeT = Runtime.getRuntime().totalMemory();
        buffer = ByteBuffer.allocate( SIZE );
        afterT = Runtime.getRuntime().totalMemory();
        end = System.currentTimeMillis();
        System.out.println( afterT - beforeT );
        System.out.println( end - start );
        i = buffer.capacity();
        
        Thread.sleep(1000 * 20);
        
        /*start = System.currentTimeMillis();
        beforeT = Runtime.getRuntime().totalMemory();
        buffer2 = ByteBuffer.allocateDirect( SIZE );
        afterT = Runtime.getRuntime().totalMemory();
        end = System.currentTimeMillis();
        System.out.println( afterT - beforeT );
        System.out.println( end - start );
        i = buffer2.capacity();
        
        Thread.sleep(1000 * 20);*/
    }
    
    public void testByteBufferMemUsage()
        throws Exception
    {
        System.out.println( "gc" );
        System.gc();
        Thread.sleep(1000 * 20);
        System.out.println( "fin" );
        System.runFinalization();
        Thread.sleep(1000 * 20);
        System.out.println( "gc" );
        System.gc();
        Thread.sleep(1000 * 20);
        System.out.println( "gc" );
        System.gc();
        Thread.sleep(1000 * 20);
    }
    
    public void testDirectBufferMemUsage()
        throws Exception
    {
        
    }
}
