fatjson not fast why?
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public class Main {
/*本例根据http://code.alibabatech.com/wiki/display/FastJSON/Examples
* jackson,gson对简单对象处理性能不错
* flex难以处理复杂对象,而且不太符合json规范
* fast可以处理循环引用
*/
public static void main(String[] args) throws IOException {
Group<User> group = new Group<User>();
group.setId(0L);
group.setName("admin");
User guestUser = new User();
guestUser.setId(2L);
guestUser.setName("guest");
User rootUser = new User();
rootUser.setId(3L);
rootUser.setName("root");
group.getUsers().add(guestUser);
group.getUsers().add(rootUser);
int t = 10000;
long sj=testJack(group,t);
long sfa=testFast(group, t);
long sfe=testFlex(group,t);
long sg=testGson(group, t);
System.err.println("jack use "+sj);
System.err.println("fast use "+sfa);
System.err.println("flex use "+sfe);
System.err.println("gson use "+sg);
}
static long testJack(Object src, int times) {
ObjectMapper objectMapper = new ObjectMapper();
long t0 = System.currentTimeMillis();
try {
JsonGenerator jsonGenerator = objectMapper.getJsonFactory()
.createJsonGenerator(System.out);
for (int i = 0; i < times; i++) {
jsonGenerator.writeObject(src);
System.out.println();
}
} catch (IOException e) {
e.printStackTrace();
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testFast(Object src, int times){
long t0 = System.currentTimeMillis();
for (int i = 0; i < times; i++) {
String jsonString = JSON.toJSONString(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testFlex(Object src, int times)
{
long t0 = System.currentTimeMillis();
JSONSerializer serializer = new JSONSerializer();
for (int i = 0; i < times; i++) {
String jsonString = serializer.serialize(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testGson(Object src, int times)
{
long t0 = System.currentTimeMillis();
Gson gson=new Gson();
for (int i = 0; i < times; i++) {
String jsonString = gson.toJson(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
}
/*本例根据http://code.alibabatech.com/wiki/display/FastJSON/Examples
* jackson,gson对简单对象处理性能不错
* flex难以处理复杂对象,而且不太符合json规范
* fast可以处理循环引用
*/
public static void main(String[] args) throws IOException {
Group<User> group = new Group<User>();
group.setId(0L);
group.setName("admin");
User guestUser = new User();
guestUser.setId(2L);
guestUser.setName("guest");
User rootUser = new User();
rootUser.setId(3L);
rootUser.setName("root");
group.getUsers().add(guestUser);
group.getUsers().add(rootUser);
int t = 10000;
long sj=testJack(group,t);
long sfa=testFast(group, t);
long sfe=testFlex(group,t);
long sg=testGson(group, t);
System.err.println("jack use "+sj);
System.err.println("fast use "+sfa);
System.err.println("flex use "+sfe);
System.err.println("gson use "+sg);
}
static long testJack(Object src, int times) {
ObjectMapper objectMapper = new ObjectMapper();
long t0 = System.currentTimeMillis();
try {
JsonGenerator jsonGenerator = objectMapper.getJsonFactory()
.createJsonGenerator(System.out);
for (int i = 0; i < times; i++) {
jsonGenerator.writeObject(src);
System.out.println();
}
} catch (IOException e) {
e.printStackTrace();
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testFast(Object src, int times){
long t0 = System.currentTimeMillis();
for (int i = 0; i < times; i++) {
String jsonString = JSON.toJSONString(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testFlex(Object src, int times)
{
long t0 = System.currentTimeMillis();
JSONSerializer serializer = new JSONSerializer();
for (int i = 0; i < times; i++) {
String jsonString = serializer.serialize(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
static long testGson(Object src, int times)
{
long t0 = System.currentTimeMillis();
Gson gson=new Gson();
for (int i = 0; i < times; i++) {
String jsonString = gson.toJson(src);
System.out.println(jsonString);
}
long t1 = System.currentTimeMillis();
return t1-t0;
}
}
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