Bench.java

import java.util.*;
import java.util.stream.*;

class A {
    public static void main(String args[]) {
	long start, finish;
	start = System.nanoTime();
	//List<Integer> result = Stream.iterate(1, n -> n + 1)
	//.limit(10000000)
	long x = LongStream.range(0, 10000000000L)
	     .map(Math::incrementExact)
	     .sum();
	finish = System.nanoTime();
	System.out.println(x);
	System.out.println((finish - start)/1000);
    }
}