Performance of primitive data type vs object data type

Using the object data type instead of its primitive counter part is very expensive. In fact, object data type is approximatively 43 times slower than its primitive counter part. However, I have to scale up to 1 billion iterations to see the difference.

/**
 * Performance of primitive data type vs object data type.
 * @author Xuan Ngo
 *
 */
public class PrimitiveVsObject
{
  public static void main(String[] args)
  {
    long lStart = 0;
    long lEnd = 0;
    int lMaxSize = 1000000000; // 1 billion.
 
    // Primitive data type
    System.out.print("Primitive data type runtime: ");
    lStart = System.currentTimeMillis();
    for(int i=0; i<lMaxSize; i++)
    {
     int test = i; 
    }
    lEnd = System.currentTimeMillis();
    System.out.println(lEnd-lStart);
    // Output: Primitive data type runtime: ~2454
 
 
    // Object data type
    System.out.print("Object data type runtime: ");
    lStart = System.currentTimeMillis();
    for(int i=0; i<lMaxSize; i++)
    {
     Integer test = new Integer(i); 
    }
    lEnd = System.currentTimeMillis();
    System.out.println(lEnd-lStart); 
    // Output: Object data type runtime: ~106593
 
  }
 
}