BAEL-3894: Added Performance Tests (eugenp#10213)

Author: Sampada

libraries-6/src/test/java/com/baeldung/apache/commons/CollectionsUnitTest.java

@@ -7,9 +7,12 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 import org.apache.commons.collections4.BidiMap;
 import org.apache.commons.collections4.MultiValuedMap;
+import org.apache.commons.collections4.bidimap.DualHashBidiMap;
+import org.apache.commons.collections4.bidimap.DualTreeBidiMap;
 import org.apache.commons.collections4.bidimap.TreeBidiMap;
 import org.apache.commons.collections4.map.MultiKeyMap;
 import org.apache.commons.collections4.multimap.ArrayListValuedHashMap;
@@ -20,6 +23,7 @@ public class CollectionsUnitTest {
     private final static MultiValuedMap<String, String> groceryCart = new ArrayListValuedHashMap<>();
     private final static MultiKeyMap<String, String> days = new MultiKeyMap<String, String>();
     private final static MultiKeyMap<String, String> cityCoordinates = new MultiKeyMap<String, String>();
+    private long start;
 
     static {
         daysOfWeek.put(1, "Monday");
@@ -106,4 +110,73 @@ public void givenCoordinatesMultiKeyMap_whenQueried_thenOK() {
 
     }
 
+    @Test
+    public void givenTreeBidiMap_whenHundredThousandKeys_thenPerformanceNoted() {
+        System.out.println("**TreeBidiMap**");
+        BidiMap<Integer, Integer> map = new TreeBidiMap<>();
+        start = System.nanoTime();
+        for (int i = 0; i < 100000; i++) {
+            Integer key = new Integer(i);
+            Integer value = new Integer(i + 1);
+            map.put(key, value);
+        }
+        System.out.println("Insertion time:" + TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer value = (Integer) map.get(new Integer(500));
+        System.out.println("Value:" + value);
+        System.out.println("Fetch time key:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer key = (Integer) map.getKey(new Integer(501));
+        System.out.println("Key:" + key);
+        System.out.println("Fetch time value:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+    }
+
+    @Test
+    public void givenDualTreeBidiMap_whenHundredThousandKeys_thenPerformanceNoted() {
+        System.out.println("**DualTreeBidiMap**");
+        BidiMap<Integer, Integer> map = new DualTreeBidiMap<>();
+        start = System.nanoTime();
+        for (int i = 0; i < 100000; i++) {
+            Integer key = new Integer(i);
+            Integer value = new Integer(i + 1);
+            map.put(key, value);
+        }
+        System.out.println("Insertion time:" + TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer value = (Integer) map.get(new Integer(500));
+        System.out.println("Value:" + value);
+        System.out.println("Fetch time key:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer key = (Integer) map.getKey(new Integer(501));
+        System.out.println("Key:" + key);
+        System.out.println("Fetch time value:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+    }
+
+    @Test
+    public void givenDualHashBidiMap_whenHundredThousandKeys_thenPerformanceNoted() {
+        System.out.println("**DualHashBidiMap**");
+        BidiMap<Integer, Integer> map = new DualHashBidiMap<>();
+        start = System.nanoTime();
+        for (int i = 0; i < 100000; i++) {
+            Integer key = new Integer(i);
+            Integer value = new Integer(i + 1);
+            map.put(key, value);
+        }
+        System.out.println("Insertion time:" + TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer value = (Integer) map.get(new Integer(500));
+        System.out.println("Value:" + value);
+        System.out.println("Fetch time key:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer key = (Integer) map.getKey(new Integer(501));
+        System.out.println("Key:" + key);
+        System.out.println("Fetch time value:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+    }
+
 }

libraries-6/src/test/java/com/baeldung/guava/GuavaUnitTest.java

@@ -6,6 +6,7 @@
 
 import java.util.Arrays;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 import org.junit.Test;
 
@@ -21,6 +22,7 @@ public class GuavaUnitTest {
     private final static Multimap<String, String> groceryCart = ArrayListMultimap.create();
     private final static Table<String, String, String> cityCoordinates = HashBasedTable.create();
     private final static Table<String, String, String> movies = HashBasedTable.create();
+    private long start;
 
     static {
         daysOfWeek.put(1, "Monday");
@@ -115,4 +117,27 @@ public void givenMoviesTable_whenFetched_thenOK() {
         assertTrue(movies.containsValue("Speed"));
 
     }
+    
+    @Test
+    public void givenHashBiMap_whenHundredThousandKeys_thenPerformanceNoted() {
+        BiMap<Integer, Integer> map = HashBiMap.create();
+        start = System.nanoTime();
+        for (int i = 0; i < 100000; i++) {
+            Integer key = new Integer(i);
+            Integer value = new Integer(i + 1);
+            map.put(key, value);
+        }
+        System.out.println("Insertion time:" + TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer value = map.get(new Integer(500));
+        System.out.println("Value:" + value);
+        System.out.println("Fetch time key:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+
+        start = System.nanoTime();
+        Integer key = map.inverse()
+            .get(new Integer(501));
+        System.out.println("Key:" + key);
+        System.out.println("Fetch time value:" + TimeUnit.MICROSECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS));
+    }
 }