伪异步IO压测使用jemeter对bio进行简单的压测，分为5线程，10线程和20线程，通过jconsole观察cpu和

只做各种IO方式的横向比较，故不列具体机器规格

一、服务端源码

TimeServer.class

 import java.io.IOException;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
 public class TimeServer {
     private static ExecutorService executor = new ThreadPoolExecutor(10, 10, 120L, TimeUnit.SECONDS,
         new ArrayBlockingQueue<>(10000));
 
     public static void main(String[] args) throws IOException {
         int port = 8080;
         if (args != null && args.length > 0) {
             try {
                 port = Integer.valueOf(args[0]);
             } catch (NumberFormatException e) {
 
             }
         }
 
         try (ServerSocket server = new ServerSocket(port);) {
             System.out.println("The time server is start in port: " + port);
             Socket socket = null;
             while (true) {
                 socket = server.accept();
                 executor.execute(new TimeServerHandler(socket));
             }
         }
     }
 }

TimeServerHandler.class

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.util.Date;
 
 public class TimeServerHandler implements Runnable {
     private Socket socket;
 
     public TimeServerHandler(Socket socket) {
         this.socket = socket;
     }
 
     @Override
     public void run() {
         try (BufferedReader in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
             PrintWriter out = new PrintWriter(this.socket.getOutputStream(), true);){
 
             String currentTime = null;
             String body = null;
             while (true) {
                 body = in.readLine();
                 if (body == null) {
                     break;
                 }
                 System.out.println("The time server receive order : " + body);
                 currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body) ? new Date(
                     System.currentTimeMillis()).toString() : "BAD ORDER";
                 out.println(currentTime);
             }
         } catch (Exception e) {
             try {
                 this.socket.close();
             } catch (IOException ioException) {
                 ioException.printStackTrace();
             }
         }
 
     }
 }