基于dubbo的RPC和RESTful性能对比

先上结论：RPC请求的效率是HTTP请求的1.6倍左右，性能明显比HTTP请求要高很多。
原因分析：RESTful是基于HTTP协议进行交互的，HTTP协议包含大量的请求头、响应头信息。而dubbo是基于dubbo自定义的二进制协议进行传输，消息体比较简单，传输数据要小很多。

HTTP请求代码：

// 服务端基于spring boot搭建
// 服务端代码
@SpringBootApplication
@RestController
public class DemoApplication {
    
    

    public static void main(String[] args) {
    
    
        SpringApplication.run(DemoApplication.class, args);
    }

    @RequestMapping("/helloworld")
    public String helloworld() {
    
    
        return "hello world";
    }

}

// 客户端代码
import org.springframework.util.StopWatch;
import org.springframework.web.client.RestTemplate;

public class HelloworldTest {
    
    
    public static void main(String[] args) {
    
    
        RestTemplate restTemplate = new RestTemplate();
        StopWatch stopWatch = new StopWatch();
        stopWatch.start();
        for (int j = 0; j < 10; j++) {
    
    
            System.out.println("------------------");
            for (int i = 1; i <= 10000; i++) {
    
    
                restTemplate.getForObject("http://127.0.0.1/helloworld", String.class);
                if (i % 1000 == 0) {
    
    
                    stopWatch.stop();
                    System.out.println(stopWatch.getTotalTimeSeconds());
                    stopWatch = new StopWatch();
                    stopWatch.start();
                }
            }
        }
    }
}

RPC代码：

// dubbo-demo工程的代码，详情请看：https://github.com/apache/dubbo/tree/master/dubbo-demo
// 服务端
public class DemoServiceImpl implements DemoService {
    
    

    @Override
    public String sayHello(String name) {
    
    
        return "Hello " + name + ", response from provider: " + RpcContext.getContext().getLocalAddress();
    }
}

// 客户端
public class Consumer {
    
    

    public static void main(String[] args) {
    
    
        //Prevent to get IPV6 address,this way only work in debug mode
        //But you can pass use -Djava.net.preferIPv4Stack=true,then it work well whether in debug mode or not
        System.setProperty("java.net.preferIPv4Stack", "true");
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{
    
    "META-INF/spring/dubbo-demo-consumer.xml"});
        context.start();
        DemoService demoService = (DemoService) context.getBean("demoService"); // get remote service proxy

        StopWatch stopWatch = new StopWatch();
        stopWatch.start();

        for (int j = 0; j < 10; j++) {
    
    
            System.out.println("-----------");
            for (int i = 1; i <= 10000; i++) {
    
    
                demoService.sayHello("world"); // call remote method
                if (i % 1000 == 0) {
    
    
                    stopWatch.stop();
                    System.out.println(stopWatch.getTotalTimeSeconds());
                    stopWatch = new StopWatch();
                    stopWatch.start();
                }
            }
        }
    }
}