public class PerformanceTest {
  public static void main(String[] args) {
    getTime(1000000);
    getTime(10000000);
    getTime(100000000);
    getTime(1000000000);
    getTime(10000000000L);
  }   
  
  public static void getTime(long n) {
    long startTime = System.currentTimeMillis();
    long k = 0;
    for (long i = 1; i <= n; i++) {
      k = k + 5;
    }
    long endTime = System.currentTimeMillis();
    System.out.println("Execution time for n = " + n 
      + " is " + (endTime - startTime) + " milliseconds");
  }
}