public void testToStrb() {
BigNum a = new BigNum(STR);
String str = null;
long st = System.currentTimeMillis();
for (int i = 0; i < MAX_CNT; i++) {
str = a.toString();
}
long ed = System.currentTimeMillis() - st;
System.out.println(str + ":" + ed + "ms");
a = null;
}
