Тест java vs nodejs по жору памяти

package test_java;

import java.util.HashMap;
import java.util.Scanner;

public class Main {

    class Table {
        Long x2;
        Long x3;
        String str;
        public Table(Long i) {
            x2 = i*2;
            x3 = i*3;
            str = x3.toString();
        }
    }
    private HashMap<Long, Table> hash = new HashMap<Long, Table>();

    public Main() {
    
    }

    private void log(String s) {
        System.out.println(s);
    }

    public void test() {
        for (long i = 0; i < 1000L*1000L; i++) {
            hash.put(i, new Table(i));
        }
        log("Generated");
        Scanner scan = new Scanner(System.in);
        scan.nextInt();
    }

    public static void main(String[] args) {
       Main m = new Main();
       m.test();
    }
}

h = {}
for (i=0; i < 1000*1000; i++) h[i] = {x2:i*2, x3:i*3, str : (i*3)+""}

$ java -version
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)

$ node --version
v10.14.2