Jira BAEL-4211 (#11193)

* Init

* Removing mvnw files

* Apply eclipse code format

* Refactoring

* Refactoring

* BAEL-4211 Add benchmarks

* Delete hexagonal directory

* Refactoring based on the feedback

* Refactoring based on feedback - package rename

* Directory rename

Co-authored-by: asia <joannakrzeklubowiecka@protonmail.com>

core-java-modules/core-java-arrays-operations-advanced/pom.xml

@@ -26,10 +26,50 @@
             <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
+
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
     </dependencies>
 
     <properties>
         <assertj-core.version>3.10.0</assertj-core.version>
+        <jmh.version>1.33</jmh.version>
     </properties>
 
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                    <archive>
+                        <manifest>
+                            <mainClass>com.baeldung.copyarraymethodsperformance.BenchmarkRunner</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/BenchmarkRunner.java

@@ -0,0 +1,11 @@
+package com.baeldung.copyarraymethodsperformance;
+
+public class BenchmarkRunner {
+
+    public static void main(String[] args) throws Exception {
+
+        org.openjdk.jmh.Main.main(args);
+
+    }
+
+}

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/ObjectsCopyBenchmark.java

@@ -0,0 +1,42 @@
+package com.baeldung.copyarraymethodsperformance;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.Arrays;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@State(Scope.Thread)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 10)
+@Fork(1)
+@Measurement(iterations = 100)
+public class ObjectsCopyBenchmark {
+
+    @Param({ "10", "1000000" })
+    public int SIZE;
+    Integer[] src;
+
+    @Setup
+    public void setup() {
+        Random r = new Random();
+        src = new Integer[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            src[i] = r.nextInt();
+        }
+    }
+
+    @Benchmark
+    public Integer[] systemArrayCopyBenchmark() {
+        Integer[] target = new Integer[SIZE];
+        System.arraycopy(src, 0, target, 0, SIZE);
+        return target;
+    }
+
+    @Benchmark
+    public Integer[] arraysCopyOfBenchmark() {
+        return Arrays.copyOf(src, SIZE);
+    }
+}

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/PrimitivesCopyBenchmark.java

@@ -0,0 +1,43 @@
+package com.baeldung.copyarraymethodsperformance;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.Arrays;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@State(Scope.Thread)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 10)
+@Fork(1)
+@Measurement(iterations = 100)
+public class PrimitivesCopyBenchmark {
+
+    @Param({ "10", "1000000" })
+    public int SIZE;
+
+    int[] src;
+
+    @Setup
+    public void setup() {
+        Random r = new Random();
+        src = new int[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            src[i] = r.nextInt();
+        }
+    }
+
+    @Benchmark
+    public int[] systemArrayCopyBenchmark() {
+        int[] target = new int[SIZE];
+        System.arraycopy(src, 0, target, 0, SIZE);
+        return target;
+    }
+
+    @Benchmark
+    public int[] arraysCopyOfBenchmark() {
+        return Arrays.copyOf(src, SIZE);
+    }
+}