Autoboxing Test

BoxText.java

import java.time.Duration;
import java.time.Instant;

public class BoxTest {
    private static long sum1() {
        long sum = 0L;
        for (long i = 0; i < Integer.MAX_VALUE; i++) {
            sum += i;
        }
        return sum;
    }

    private static long sum2() {
        Long sum = 0L;
        for (long i = 0; i < Integer.MAX_VALUE; i++) {
            sum += i;
        }
        return sum;
    }

    public static void main(String[] args) {
        Instant start = Instant.now();
        sum1();
        Instant end = Instant.now();
        System.out.println(Duration.between(start, end).toMillis());

        start = Instant.now();
        sum2();
        end = Instant.now();
        System.out.println(Duration.between(start, end).toMillis());
    }
}