Testing chained comparators from java 8 (about 10% decrease in performance compared to pre-java8 implementation)

Java8ChainedComparatorTest.java

public class Java8ComparatorTest {

	@Test
	public void testJava8ChainedComparators() {
		Comparator<Person> personComparator = Comparator.comparingInt(Person::getAge)
				.thenComparing(Person::getName)
				.thenComparing(Person::getOccupation, (o1, o2) -> {
					return o1.compareTo(o2);
				});


		List<Person> people = Arrays.asList(
				new Person(11, "b", "c"),
				new Person(10, "a", "b"),
				new Person(10, "b", "a"));

		people.sort(personComparator);

		Person firstPerson = people.get(0);
		assertThat(firstPerson.getAge()).isEqualTo(10);
		assertThat(firstPerson.getName()).isEqualTo("a");
		assertThat(firstPerson.getOccupation()).isEqualTo("b");
	}

	class Person {

		private Integer age;
		private String name;
		private String occupation;

		public Person(Integer age, String name, String occupation) {
			this.age = age;
			this.name = name;
			this.occupation = occupation;
		}

		public Integer getAge() {
			return age;
		}

		public String getName() {
			return name;
		}

		public String getOccupation() {
			return occupation;
		}
	}
}