springBoot3.2 + jdk21 + GraalVM上手体验

springBoot3.2 + jdk21 + GraalVM上手体验

SpringBoot2.x官方已经停止维护了，jdk8这次真的得换了🤣

• 可以参考官方文章进行体验：https://spring.io/blog/2023/09/09/all-together-now-spring-boot-3-2-graalvm-native-images-java-21-and-virtual
• 通过官方快速得到一个基于jdk21的项目：https://start.spring.io/

快速体验（二进制部署）

@RestController@SpringBootApplicationpublicclassDemoApplication{publicstaticvoidmain(String[] args){SpringApplication.run(DemoApplication.class, args);}@GetMapping("/customers")Collection<Customer>customers(){returnSet.of(newCustomer(1,"A"),newCustomer(2,"B"),newCustomer(3,"C"));}recordCustomer(Integer id,String name){}}

启动非常快，秒启动

压测环境内存占用大概

70MB

左右，空闲时在

20MB

左右（由于直接打成二进制文件了，不能再使用jconsole、arthas之类的进行监控了），性能上由于不需要JVM预热，性能启动即巅峰。

$ ab -c50-n10000 http://localhost:8080/customers
Server Software:
Server Hostname:        localhost
Server Port:            8080

Document Path:          /customers
Document Length:        61 bytes

Concurrency Level:      50
Time taken for tests:   1.413 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      1660000 bytes
HTML transferred:       610000 bytes
Requests per second:    7076.39[#/sec] (mean)
Time per request:       7.066[ms](mean)
Time per request:       0.141[ms](mean, across all concurrent requests)
Transfer rate:          1147.15[Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        028.02144
Processing:     156.74147
Waiting:        045.63145
Total:          1710.46149

快速体验（jar部署）

jar包占用只有19MB，已经不能算是小胖jar了😊

内存占用在压测时大概在200MB左右，空闲时在160MB左右。性能显然也不是启动即巅峰，可以看出其实还是需要进行JVM预热才能达到性能巅峰的

$ ab -c50-n10000 http://localhost:8080/customers
Server Software:
Server Hostname:        localhost
Server Port:            8080

Document Path:          /customers
Document Length:        61 bytes

Concurrency Level:      50
Time taken for tests:   17.930 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      1660000 bytes
HTML transferred:       610000 bytes
Requests per second:    557.72[#/sec] (mean)
Time per request:       89.651[ms](mean)
Time per request:       1.793[ms](mean, across all concurrent requests)
Transfer rate:          90.41[Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        038430.227004
Processing:     01490.481773
Waiting:        01288.761771
Total:          153439.0107011

对比golang

package main

import("encoding/json""flag""fmt""net/http")var port = flag.String("p","8080","please input port")funcmain(){
    http.HandleFunc("/customers",func(writer http.ResponseWriter, request *http.Request){
        data,_:= json.Marshal(request.URL)
        writer.Write(data)})
    e :=make(chanerror)gofunc(){
        e <- fmt.Errorf("error[%v]", http.ListenAndServe(":"+*port,nil))}()
    fmt.Println("http 服务器启动...")
    fmt.Println(<-e)}

这里golang没有使用框架，仅使用标准库，所以内存占用较低，仅

10MB

左右，不过即使使用Gin之类的web框架，内存也不会超过20MB

$ ab -c50-n10000 http://localhost:8080/customers
Server Software:
Server Hostname:        localhost
Server Port:            8080

Document Path:          /customers
Document Length:        161 bytes

Concurrency Level:      50
Time taken for tests:   1.380 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      2790000 bytes
HTML transferred:       1610000 bytes
Requests per second:    7247.68[#/sec] (mean)
Time per request:       6.899[ms](mean)
Time per request:       0.138[ms](mean, across all concurrent requests)
Transfer rate:          1974.71[Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0216.52459
Processing:     0427.92460
Waiting:        0210.52459
Total:          1732.34462

结论

AOT-processed已经相对成熟，效果可以说非常惊艳，解决了

JVM

启动慢、需要预热、内存占用大等问题。

美中不足的是编译速度非常慢，笔者电脑是2017款mac book pro编译花费大概15分钟左右

Finished generating 'demo'in 14m 33s.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  15:45 min
[INFO] Finished at: 2023-12-01T17:00:21+08:00
[INFO] ------------------------------------------------------------------------

[INFO] Total time: 15:45 min
[INFO] Finished at: 2023-12-01T17:00:21+08:00
[INFO] ------------------------------------------------------------------------

可以看出java在云原生大环境下已经取得了不错的进步的