source: DCWoRMS/trunk/example/tomekp/experiment1/PerfTest.java @ 477

package tomekp.experiment1;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.commons.lang.ArrayUtils;

public class PerfTest {

        /**
         * @param args
         */
        public static void main(String[] args) {
                // TODO Auto-generated method stub

                List<String> list1 = null;
                List<String> list2 = new ArrayList<String>();
                list2.addAll(list1);
                long sm1 = System.currentTimeMillis();
                for(int i =0;i < 10000000;i++){
                        HashMap hm = new HashMap(1);
                        hm.put(1, 1);
                }
                long em1  = System.currentTimeMillis();
                System.out.println("map1:" + (em1 -sm1 ));
                
                long sm2 = System.currentTimeMillis();
                for(int i =0;i < 10000000;i++){
                        HashMap hm = new HashMap(2);
                        hm.put(1, 1);
                }
                long em2  = System.currentTimeMillis();
                System.out.println("map1:" + (em2 -sm2 ));
                
                int boundary = 1000;
                System.out.println("a");
                List<String> list = new ArrayList<String>();
                for(int i = 0;i < boundary;i++){
                        list.add("a"+i);
                }
                
                /*System.out.println("b");
                String longString = new String();
                for(int i = 0;i < boundary ;i++){
                        longString = longString.concat("a"+i+"_");
                }*/
                
                System.out.println("c");
                
                long s = System.currentTimeMillis();
                String[] array = list.toArray(new String[list.size()]);
                long e = System.currentTimeMillis();
                System.out.println("transform: " + (e-s));
                
                long s1 = System.currentTimeMillis();
                for(int i = 0;i < boundary ;i++){
                        if(list.contains("a"+i)){
                                //System.out.println("ok1");
                        }
                }
                long e1 = System.currentTimeMillis();
                System.out.println("list: " + (e1-s1));

                /*long s2 = System.currentTimeMillis();
                for(int i = 0;i < boundary; i++){
                        if(longString.contains("a"+i)){
                                //System.out.println("ok2");
                        }
                }
                long e2 = System.currentTimeMillis();
                System.out.println("string:" + (e2-s2));
                */
                
                long s3 = System.currentTimeMillis();
                for(int i = 0;i < boundary; i++){
                        if(array[i].equals("a"+i)){
                                //System.out.println("ok3");
                                //System.out.println(array[i]);
                        }
                }
                long e3 = System.currentTimeMillis();
                System.out.println("array:" + (e3-s3));
                
                
                long s5 = System.currentTimeMillis();
                ArrayUtils.contains(list.toArray(new String[list.size()]), new String("a"+1000));
                long e5 = System.currentTimeMillis();
                System.out.println("array:" + (e5-s5));
        }

}