我非常怀疑除非您发送了一个非常大的对象,否则XStream不会花费200毫秒。您确定您的虚拟机已经预热了吗?
我不建议使用StringBuffer,因为它是线程安全的,每次调用都需要锁定。改用StringBuilder。
以下测试打印输出:
Took 56 us on average to serialise a Person
无论你正在序列化什么,它都要花费4000倍的时间。要么你的测试没有预热,要么你在发送大量的数据。如果是后者,我建议以二进制格式发送数据。
public class XStreamTest {
public static class Person {
private String firstname;
private String lastname;
private PhoneNumber phone;
private PhoneNumber fax;
public Person(String firstname, String lastname, PhoneNumber phone, PhoneNumber fax) {
this.firstname = firstname;
this.lastname = lastname;
this.phone = phone;
this.fax = fax;
}
}
public static class PhoneNumber {
private int code;
private String number;
public PhoneNumber(int code, String number) {
this.code = code;
this.number = number;
}
}
public static void main(String... args) {
XStream xstream = new XStream();
xstream.alias("person", Person.class);
xstream.alias("phonenumber", PhoneNumber.class);
Person joe = new Person("Joe", "Walnes", new PhoneNumber(123, "1234-456"), new PhoneNumber(123, "9999-999"));
final int warmup = 10000;
final int runs = 20000;
long start = 0;
for (int i = -warmup; i < runs; i++) {
if(i == 0) start = System.nanoTime();
String xml = xstream.toXML(joe);
}
long time = System.nanoTime() - start;
System.out.printf("Took %,d us on average to serialise a Person%n", time / runs / 1000);
}
}