Creating a JMH benchmark

To start using JMH, the following dependencies have to be added to the pom.xml file:

<dependency>
    <groupId>org.openjdk.jmh</groupId>
    <artifactId>jmh-core</artifactId>
    <version>1.21</version>
</dependency>
<dependency>
    <groupId>org.openjdk.jmh</groupId>
    <artifactId>jmh-generator-annprocess</artifactId>
    <version>1.21</version>
</dependency>

The name of the second .jar file, annprocess, provides a hint that JMH uses annotations. If you guessed so, you were correct. Here is an example of a benchmark created for testing the performance of an algorithm:

public class BenchmarkDemo {
    public static void main(String... args) throws Exception{
        org.openjdk.jmh.Main.main(args);
    }
    @Benchmark
    public void testTheMethod() {
        int res =...