七种WebSocket框架的性能比较-IT家园

摘要

本文介绍了Netty、Undertow、Jetty、Vert.x、Grizzly、spray-websocket、nodejs-websocket/Node.js、Go八个框架实现websocket

原文出处：鸟窝

前一篇文章使用四种框架分别实现百万websocket常连接的服务器介绍了四种websocket框架的测试方法和基本数据。最近我又使用几个框架实现了websocket push服务器的原型，并专门对这七种实现做了测试。本文记录了测试结果和一些对结果的分析。
这七种框架是：

最近用Golang实现了第八种，Go表现还不错。

测试环境

使用三台C3.4xlarge AWS服务器做测试。一台作为服务器，两台作为客户端机器，每台客户端机器启动10个client,一共20个client
C3.4xlarge的配置如下：

服务器和客户端机器按照上一篇文章做了基本的优化。

以下是测试的配置数据：

20 clients
setup rate设为500 * 20 requests/second = 10000 request /second
每个client负责建立50000个websocket 连接
等1,000,000个websocket建好好，发送一个消息(时间戳)给所有的客户端，客户端根据时间戳计算latency
如果服务器setup rate建立很慢，主动停止测试
监控三个阶段的性能指标： setup时， setup完成后应用发呆(idle)时，发送消息时

1 Netty

Setup时

cpu idle: 90%
minor gc: Few
full gc: No

Setup完成，应用Idle时

cpu idle: 100%
memory usage: 1.68G
server free memory: 16.3G

发送消息时

cpu idle: 75%
minor gc: few
full gc: No
Message latency (one client)

       count = 50000
         min = 0
         max = 18301
        mean = 2446.09
      stddev = 3082.11
      median = 1214.00
        75% <= 3625.00
        95% <= 8855.00
        98% <= 12069.00
        99% <= 13274.00
      99.9% <= 18301.00

2 Vert.x

Setup时

cpu idle: 95%
minor gc: Few
full gc: No

Setup完成，应用Idle时

cpu idle: 100%
memory usage: 6.37G
server free memory: 16.3G

发送消息时

cpu idle: 47% ~ 76%
minor gc: few
full gc: few
Message latency (one client)

       count = 50000
         min = 49
         max = 18949
        mean = 10427.00
      stddev = 5182.72
      median = 10856.00
        75% <= 14934.00
        95% <= 17949.00
        98% <= 18458.00
        99% <= 18658.00
      99.9% <= 18949.00

3 Undertow

Setup时

cpu idle: 90%
minor gc: Few
full gc: No

Setup完成，应用Idle时

cpu idle: 100%
memory usage: 4.02G
server free memory: 14.2G

发送消息时

cpu idle: 65%
minor gc: few
full gc: No
Message latency

       count = 50000
         min = 1
         max = 11948
        mean = 1366.86
      stddev = 2007.77
      median = 412.00
        75% <= 2021.00
        95% <= 5838.00
        98% <= 7222.00
        99% <= 8051.00
      99.9% <= 11948.00

4 Jetty

Setup时

cpu idle: 2%
minor gc: Many
full gc: No
memory usage: 5G
server free memory: 17.2G

当建立360,000左右的websocket时， setup非常的慢， gc频繁，无法继续正常建立websocket，主动终止测试。

5 Grizzly

Setup时

cpu idle: 20%
minor gc: Some
full gc: Some
memory usage: 11.5G
server free memory: 12.3G

当建立500,000左右的websocket时， setup非常的慢， gc频繁，无法继续正常建立websocket，主动终止测试。

6 Spray

Setup时

cpu idle: 80%
minor gc: Many
full gc: No

当建立500,000左右的websocket时， setup非常的慢， gc频繁，无法继续正常建立websocket，主动终止测试。

7 Node.js

Setup时

cpu idle: 94%

Setup完成，应用Idle时

cpu idle: 100%
memory usage: 5.0G
server free memory: 16.3G

发送消息时

cpu idle: 94%
Message latency (one client)
Message latency

       count = 50000
         min = 0
         max = 18
        mean = 1.27
      stddev = 3.08
      median = 1.00
        75% <= 1.00
        95% <= 1.00
        98% <= 1.00
        99% <= 1.00
      99.9% <= 15.00

8 Go

Setup时

cpu idle: 94%

Setup完成，应用Idle时

cpu idle: 100%
memory usage: 15G
server free memory: 6G

发送消息时

cpu idle: 94%
Message latency (one client)
Message latency

       count = 50000
         min = 0
         max = 35
        mean = 1.89
      stddev = 1.83
      median = 1.00
        75% <= 1.00
        95% <= 2.00
        98% <= 2.00
        99% <= 4.00
      99.9% <= 34.00