final sort tests

core-java-collections/src/main/java/com/baeldung/java/sort/CollectionsSortCompare.java

@@ -0,0 +1,39 @@
+package com.baeldung.java.sort;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class CollectionsSortCompare {
+
+    public static void main(String[] args) {
+        sortPrimitives();
+        sortReferenceType();
+        sortCollection();
+    }
+
+    private static void sortReferenceType() {
+        Integer[] numbers = {5, 22, 10, 0};
+        Arrays.sort(numbers);
+        System.out.println(Arrays.toString(numbers));
+    }
+
+    private static void sortCollection() {
+        List<Integer> numbersList = new ArrayList<>();
+        numbersList.add(5);
+        numbersList.add(22);
+        numbersList.add(10);
+        numbersList.add(0);
+
+        Collections.sort(numbersList);
+
+        numbersList.forEach(System.out::print);
+    }
+
+    private static void sortPrimitives() {
+        int[] numbers = {5, 22, 10, 0};
+        Arrays.sort(numbers);
+        System.out.println(Arrays.toString(numbers));
+    }
+}

core-java-collections/src/main/java/com/baeldung/performance/ArraySortBenchmark.java

@@ -12,37 +12,30 @@ import java.util.List;
 import java.util.concurrent.TimeUnit;
 
 @BenchmarkMode(Mode.SingleShotTime)
-@OutputTimeUnit(TimeUnit.MINUTES)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
 @Measurement(batchSize = 100000, iterations = 10)
 @Warmup(batchSize = 100000, iterations = 10)
 public class ArraySortBenchmark {
 
     @State(Scope.Thread)
     public static class Initialize {
-
-        String[] words = {"Java", "Baeldung", "Tutorial"};
-        List<String> wordList = new ArrayList<>();
-
-        @Setup(Level.Trial)
-        public void setUp() {
-            wordList.add("Java");
-            wordList.add("Baeldung");
-            wordList.add("Tutorial");
-        }
+        Integer[] numbers = {5, 22, 10, 0};
+        int[] primitives = {5, 22, 10, 0};
     }
 
     @Benchmark
-    public String[] benchmarkArraysSort(ArraySortBenchmark.Initialize state) {
-        Arrays.sort(state.words);
-        return state.words;
+    public Integer[] benchmarkArraysIntegerSort(ArraySortBenchmark.Initialize state) {
+        Arrays.sort(state.numbers);
+        return state.numbers;
     }
 
     @Benchmark
-    public List<String> benchmarkCollectionsSort(ArraySortBenchmark.Initialize state) {
-        Collections.sort(state.wordList);
-        return state.wordList;
+    public int[] benchmarkArraysIntSort(ArraySortBenchmark.Initialize state) {
+        Arrays.sort(state.primitives);
+        return state.primitives;
     }
 
+
     public static void main(String[] args) throws Exception {
         Options options = new OptionsBuilder()
                 .include(ArraySortBenchmark.class.getSimpleName()).threads(1)