Add files via upload (#14006)

core-java-modules/core-java-collections-list-5/pom.xml

@@ -14,6 +14,12 @@
     </parent>
 
     <dependencies>
+	<dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>1.36</version>
+        </dependency>
+
         <dependency>
             <groupId>commons-lang</groupId>
             <artifactId>commons-lang</artifactId>
@@ -27,6 +33,7 @@
     </dependencies>
 
     <properties>
+	<jmh.version>1.21</jmh.version>
         <commons-lang.version>2.2</commons-lang.version>
         <commons-lang3.version>3.12.0</commons-lang3.version>
     </properties>

core-java-modules/core-java-collections-list-5/src/main/java/com/baeldung/arrayandlistperformance/ArrayAndArrayListPerformance.java

@@ -0,0 +1,65 @@
+package com.baeldung.arrayandlistperformance;
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+import java.util.ArrayList;
+import java.util.concurrent.TimeUnit;
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+public class ArrayAndArrayListPerformance {
+
+    @Benchmark
+    public void arrayCreation() {
+        int[] array = new int[1000000];
+    }
+
+    @Benchmark
+    public void arrayListCreation() {
+        ArrayList<Integer> list = new ArrayList<>(1000000);
+    }
+
+    @Benchmark
+    public void arrayItemSetting() {
+        int[] array = new int[1000000];
+        array[0] = 10;
+    }
+
+    @Benchmark
+    public void arrayListItemSetting() {
+        ArrayList<Integer> list = new ArrayList<>(1000000);
+        list.add(0, 10);
+    }
+
+    @Benchmark
+    public void arrayItemRetrieval() {
+        int[] array = new int[1000000];
+        array[0] = 10;
+        int item = array[0];
+    }
+
+    @Benchmark
+    public void arrayListItemRetrieval() {
+        ArrayList<Integer> list = new ArrayList<>(1000000);
+        list.add(0, 10);
+        int item2 = list.get(0);
+    }
+
+    @Benchmark
+    public void arrayCloning() {
+        int[] array = new int[1000000];
+        int[] newArray = array.clone();
+    }
+
+    @Benchmark
+    public void arrayListCloning() {
+        ArrayList<Integer> list = new ArrayList<>(1000000);
+        ArrayList<Integer> newList = new ArrayList<>(list);
+    }
+    public static void main(String[] args) throws Exception {
+        org.openjdk.jmh.runner.Runner runner = new org.openjdk.jmh.runner.Runner(new OptionsBuilder()
+                .include(ArrayAndArrayListPerformance.class.getSimpleName())
+                .forks(1)
+                .build());
+        runner.run();
+    }
+    }