Is java ArrayList really much slower than C vectors?

I don't want to start another meaningless flame war about whether Java or C is a better language I want to know whether the comparison I made for a specific task is fair and whether the measurement data is correct@ H_ 404_ 2 @ we need to decide whether to use Java or C for our next project I'm in camp C, but I want to have a good argument for my case Our application is special and has the following requirements:

#include <iostream>
#include <vector>
#include <cstdlib>
using namespace std;

struct Point{
        float x,y;
};

int main(int argc,char*argv[]){
        int n = atoi(argv[1]);

        vector<Point>arr;

        for(int i=0; i<n; ++i){
                Point p;
                p.x = i;
                p.y = i+0.5f;
                arr.push_back(p);
        }

        float dotp = 0;
        for(int i=0; i<n; ++i)
                dotp += arr[i].x * arr[i].y;

        cout << dotp << endl;
}

import java.util.*;

class Point{
        public float x,y;
}

class Main{
        static public void main(String[]args){
                int n = Integer.parseInt(args[0]);

                ArrayList<Point> arr = new ArrayList<Point>();

                for(int i=0; i<n; ++i){
                        Point p = new Point();
                        p.x = i;
                        p.y = i+0.5f;
                        arr.add(p);
                }

                float dotp = 0;
                for(int i=0; i<n; ++i)
                        dotp += arr.get(i).x * arr.get(i).y;

                System.out.println(dotp);
        }
}

$g++ --version
g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
$g++ -O3 test.cpp -o test
$/usr/bin/time ./test 1000000
3.33381e+17
0.01user 0.00system 0:00.02elapsed 100%cpu (0avgtext+0avgdata 10084maxresident)k
0inputs+0outputs (0major+2348minor)pagefaults 0swaps
$/usr/bin/time ./test 10000000
3.36984e+20
0.08user 0.01system 0:00.09elapsed 100%cpu (0avgtext+0avgdata 134380maxresident)k
0inputs+0outputs (0major+4074minor)pagefaults 0swaps
$/usr/bin/time ./test 100000000
2.42876e+23
0.77user 0.09system 0:00.87elapsed 99%cpu (0avgtext+0avgdata 1050400maxresident)k
0inputs+0outputs (0major+6540minor)pagefaults 0swaps

$javac -version
javac 1.6.0_41
$javac Main.java
$java -version
java version "1.7.0_131"
OpenJDK Runtime Environment (IcedTea 2.6.9) (7u131-2.6.9-0ubuntu0.14.04.2)
OpenJDK 64-Bit Server VM (build 24.131-b00,mixed mode)
$/usr/bin/time java Main 1000000
3.33381168E17
0.16user 0.00system 0:00.09elapsed 173%cpu (0avgtext+0avgdata 79828maxresident)k
0inputs+64outputs (0major+4314minor)pagefaults 0swaps
$/usr/bin/time java Main 10000000
3.3698438E20
5.23user 0.18system 0:02.07elapsed 261%cpu (0avgtext+0avgdata 424180maxresident)k
0inputs+64outputs (0major+13508minor)pagefaults 0swaps
$/usr/bin/time java Main 100000000
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at Main.main(Main.java:14)
Command exited with non-zero status 1
3840.72user 13.06system 17:11.79elapsed 373%cpu (0avgtext+0avgdata 2281416maxresident)k
0inputs+1408outputs (0major+139893minor)pagefaults 0swaps

Solution

28.689 millis for 1 M pairs
 143.104 millis for 10 M pairs
3100.856 millis for 100 M pairs
  10.404 millis for 1 M pairs
 113.054 millis for 10 M pairs
2528.371 millis for 100 M pairs

31.505 millis for 1 M pairs
 232.658 millis for 10 M pairs
1870.664 millis for 100 M pairs
  17.536 millis for 1 M pairs
 219.222 millis for 10 M pairs
1757.475 millis for 100 M pairs