1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/CollectionsSpeedTest.java	Tue Sep 13 19:08:15 2011 +0200
     1.3 @@ -0,0 +1,72 @@
     1.4 +/*
     1.5 + *   StarOffice News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package test;
    1.23 +
    1.24 +import java.util.ArrayList;
    1.25 +import java.util.LinkedList;
    1.26 +import java.util.List;
    1.27 +import java.util.ListIterator;
    1.28 +
    1.29 +/**
    1.30 + * Tests the speed of LinkedList and ArrayList.
    1.31 + * @author Christian Lins
    1.32 + * @since sonews/0.5.0
    1.33 + */
    1.34 +public class CollectionsSpeedTest 
    1.35 +{
    1.36 +
    1.37 +  public static void main(String[] args)
    1.38 +  {
    1.39 +    List arrayList  = new ArrayList();
    1.40 +    List linkedList = new LinkedList();
    1.41 +    
    1.42 +    int numElements = 100000;
    1.43 +    
    1.44 +    System.out.println("ArrayList.add(): " + add(arrayList, numElements) + "ms");
    1.45 +    System.out.println("LinkenList.add(): " + add(linkedList, numElements) + "ms");
    1.46 +    System.out.println("ArrayList.iterate: " + iterate(arrayList) + "ms");
    1.47 +    System.out.println("LinkedList.iterate: " + iterate(linkedList) + "ms");
    1.48 +  }
    1.49 +  
    1.50 +  private static long add(List list, int numElements)
    1.51 +  {
    1.52 +    long start = System.currentTimeMillis();
    1.53 +    
    1.54 +    for(int n = 0; n < numElements; n++)
    1.55 +    {
    1.56 +      list.add(new Object());
    1.57 +    }
    1.58 +    
    1.59 +    return System.currentTimeMillis() - start;
    1.60 +  }
    1.61 +  
    1.62 +  private static long iterate(List list)
    1.63 +  {
    1.64 +    long start = System.currentTimeMillis();
    1.65 +    
    1.66 +    ListIterator iter = list.listIterator();
    1.67 +    while(iter.hasNext())
    1.68 +    {
    1.69 +      iter.next();
    1.70 +    }
    1.71 +    
    1.72 +    return System.currentTimeMillis() - start;
    1.73 +  }
    1.74 +  
    1.75 +}