diff --git a/core-java-modules/core-java-collections-4/pom.xml b/core-java-modules/core-java-collections-4/pom.xml
index daf2588ece..7eb8222211 100644
--- a/core-java-modules/core-java-collections-4/pom.xml
+++ b/core-java-modules/core-java-collections-4/pom.xml
@@ -1,31 +1,31 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <artifactId>core-java-collections-4</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <name>core-java-collections-4</name>
-    <packaging>jar</packaging>
-    
-    <parent>
-        <groupId>com.baeldung.core-java-modules</groupId>
-        <artifactId>core-java-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
-    </parent>
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>core-java-collections-4</artifactId>
+	<version>0.1.0-SNAPSHOT</version>
+	<name>core-java-collections-4</name>
+	<packaging>jar</packaging>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
+	<parent>
+		<groupId>com.baeldung.core-java-modules</groupId>
+		<artifactId>core-java-modules</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
 
-    <properties>
-        <assertj.version>3.19.0</assertj.version>
-    </properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>${assertj.version}</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<properties>
+		<assertj.version>3.19.0</assertj.version>
+	</properties>
 
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-collections-4/src/main/java/com/baeldung/collections/toarraycomparison/ToArrayBenchmark.java b/core-java-modules/core-java-collections-4/src/main/java/com/baeldung/collections/toarraycomparison/ToArrayBenchmark.java
new file mode 100644
index 0000000000..fe76a9ab3d
--- /dev/null
+++ b/core-java-modules/core-java-collections-4/src/main/java/com/baeldung/collections/toarraycomparison/ToArrayBenchmark.java
@@ -0,0 +1,72 @@
+package com.baeldung.collections.toarraycomparison;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.TreeSet;
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(value = 3, jvmArgsAppend = { "-XX:+UseParallelGC", "-Xms4g", "-Xmx4g" })
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Benchmark)
+public class ToArrayBenchmark {
+
+    @Param({ "10", "10000", "10000000" })
+    private int size;
+
+    @Param({ "array-list", "tree-set" })
+    private String type;
+
+    private Collection<String> collection;
+
+    @Setup
+    public void setup() {
+        switch (type) {
+        case "array-list":
+            collection = new ArrayList<String>();
+            break;
+        case "tree-set":
+            collection = new TreeSet<String>();
+            break;
+        default:
+            throw new UnsupportedOperationException();
+        }
+        for (int i = 0; i < size; i++) {
+            collection.add(String.valueOf(i));
+        }
+    }
+
+    @Benchmark
+    public String[] zero_sized() {
+        return collection.toArray(new String[0]);
+    }
+
+    @Benchmark
+    public String[] pre_sized() {
+        return collection.toArray(new String[collection.size()]);
+    }
+
+
+    public static void main(String[] args) {
+        try {
+            org.openjdk.jmh.Main.main(args);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}