tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/MapTest.java

   1 package org.simantics.db.tests.performance.java;
   2
   3 import gnu.trove.map.hash.TIntByteHashMap;
   4
   5 import java.util.TreeMap;
   6
   7 import org.simantics.db.testing.base.TestCommonPerf;
   8
   9
  10 public class MapTest extends TestCommonPerf {
  11
  12         public void a(TIntByteHashMap map, int i) {
  13                 byte test = (byte)i;
  14                 byte value = map.get(test);
  15                 if(value == 0) {
  16                         map.put(test, value);
  17                 }
  18         }
  19
  20         public void b(TreeMap<Integer, Byte> map2, int i) {
  21                 Byte value = map2.get(i);
  22                 if(value == null) {
  23                         map2.put(i, value);
  24                 }
  25         }
  26
  27         public void test() throws Exception {
  28
  29                 TIntByteHashMap map = new TIntByteHashMap();
  30
  31                 long start = System.nanoTime();
  32                 for(int i=0;i<12000000;i++) {
  33                         byte test = (byte)i;
  34                         byte value = map.get(test);
  35                         if(value == 0) {
  36                                 map.put(test, value);
  37                         }
  38                 }
  39                 long duration = System.nanoTime() - start;
  40                 System.err.println("took " + 1e-9*duration);
  41
  42                 TIntByteHashMap map2 = new TIntByteHashMap();
  43                 long start2 = System.nanoTime();
  44                 for(int i=0;i<10000000;i++) a(map2, i);
  45                 long duration2 = System.nanoTime() - start2;
  46                 System.err.println("took " + 1e-9*duration2);
  47
  48                 TreeMap<Integer, Byte> map3 = new TreeMap<Integer, Byte>();
  49                 long start3 = System.nanoTime();
  50                 for(int i=0;i<10000000;i++) {
  51                         Byte value = map3.get(i);
  52                         if(value == null) {
  53                                 map3.put(i, value);
  54                         }
  55                 }
  56                 long duration3 = System.nanoTime() - start3;
  57                 System.err.println("took " + 1e-9*duration3);
  58
  59                 TreeMap<Integer, Byte> map4 = new TreeMap<Integer, Byte>();
  60                 long start4 = System.nanoTime();
  61                 for(int i=0;i<10000000;i++) b(map4, i);
  62                 long duration4 = System.nanoTime() - start4;
  63                 System.err.println("took " + 1e-9*duration4);
  64
  65         }
  66
  67 }