spring-amqp消费器的性能非常慢

Question

我一直在使用spring-boot consumer遇到麻烦。我比较了两个消费者的工作。第一消费者：

import com.rabbitmq.client.*;
import java.io.IOException;

public class Recv {
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                     AMQP.BasicProperties properties, byte[] body) throws IOException {
            }
        };

        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

第二消费者：

@Controller
public class Consumer {

    @RabbitListener(queues = "hello")
    public void processMessage(Message message) {
    }
}

没有为spring-boot消费者安装配置文件，一切都是默认的。在我的电脑上，第一个速度快了10倍。可能的问题是什么？