zhb8015

楼主总结的不错，相信这样持续的总结下去会收获不少。自己也存在这样的毛病，只有好好梳理了，东西才是自己的。

补充一下：
七、性能测试：
测试结果：复制100000 克隆复制是串行化复制的74倍
100000 clone time:47
100000 serial clone time:3500
Multiple is(serial/clone):74

测试单元的代码：
******************
@Test
public void deepCloneVsSerial() throws CloneNotSupportedException, IOException, ClassNotFoundException {
int max = 100000;

String manName = "Robert C. Martin";
int manAge = 40;

int teacherAge = 50;
String teacherName = "T1";
Teacher teacher = new Teacher(teacherName, teacherAge);

Man man = new Man(manName, manAge, teacher);

//begin
long start1 = System.currentTimeMillis();
for (int i = 0; i < max; i++) {
man.clone();
}
long end1 = System.currentTimeMillis();
System.err.println(max + " clone time:" + (end1 - start1));

long start2 = System.currentTimeMillis();
for (int i = 0; i < max; i++) {
man.serialClone();
}
long end2 = System.currentTimeMillis();
System.err.println(max + " serial clone time:" + (end2 - start2));

System.err.println("Multiple is(serial/clone):" + (end2 - start2)/(end1 - start1));
/**
* 100000 clone time:47
100000 serial clone time:3438
Multiple is(serial/clone):73
*/
}

******************

Robert C. Martin's explation:


/**
* Every multiple in the array has a prime factor that
* is less than or equal to the root of the array size,
* so we don't have to cross of multiples of numbers
* larger than that root.
*/