public void testAddc() { BigNum2 a2 = new BigNum2(STR); BigNum2 b2 = new BigNum2(STR); long st = System.currentTimeMillis(); for (int i = 0; i < MAX_CNT; i++) { b2 = b2.add(a2); } long ed = System.currentTimeMillis() - st; System.out.println(b2 + ":" + ed + "ms"); a2 = null; b2 = null; }