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java与python web的ab压测

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java与python web的ab测试

背景介绍

项目打算新做一个系统，项目组大部分熟悉python，所以考虑选用python来做web后台。python确实简单呀，这短短多少日子，我用python做了爬虫，做了代码生成工具，用了redash报表，airflow任务调度，python调用微信webapi实现机器人，巴拉巴拉巴拉巴拉。确实简单，会用很简单，但是不深入，而且我总觉得python脚本语言用来开发web应用，有点怎么说呢，不得劲，毕竟java web在脑中根深蒂固。而组织者一心喜欢python这样的脚本语言，快速开发。于是我简单的看了一下python的web框架，简单应用了fastapi与tornado。搭建了超简单的web应用。

代码

都是最最原始的，不做任何优化什么的，直接按官网入门例子。

fastapi

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_items():
    return 'Hello world'

tornado

import tornado.ioloop
import tornado.web


class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")


def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])


if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

springboot

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author ling
 * @date 2020/1/14
 * @copyright http://lostmylife.top/
 * @since
 */
@RestController
public class Controller {

    @GetMapping("/")
    public Object test(){
        return "Hello world";
    }

}

ab 压测

ab是apache自带的压力测试工具，以下的语法的意思是
-n 指定压力测试总共访问页面的次数，默认是1
-c 用于一次产生请求的并发数，默认是1
-r 指定接收到错误信息时不退出程序

fastapi

ab  -n10000   -c 100 -r  http://127.0.0.1:8000/
......
Server Software:        uvicorn
Server Hostname:        127.0.0.1
Server Port:            8000
Document Path:          /
Document Length:        13 bytes
Concurrency Level:      100
Time taken for tests:   3.333 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      1380000 bytes
HTML transferred:       130000 bytes
Requests per second:    3000.31 [#/sec] (mean)
Time per request:       33.330 [ms] (mean)
Time per request:       0.333 [ms] (mean, across all concurrent requests)
Transfer rate:          404.34 [Kbytes/sec] received
Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    2   2.4      1      86
Processing:     4   32  12.8     29     118
Waiting:        1   29  13.0     26     117
Total:          4   33  12.9     31     119

Percentage of the requests served within a certain time (ms)
  50%     31
  66%     31
  75%     32
  80%     33
  90%     35
  95%     45
  98%     98
  99%    108
 100%    119 (longest request)

tornado

ab  -n10000   -c 100 -r  http://127.0.0.1:8888/
......
Server Software:        TornadoServer/4.2
Server Hostname:        127.0.0.1
Server Port:            8888
Document Path:          /
Document Length:        12 bytes
Concurrency Level:      100
Time taken for tests:   5.454 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      2050000 bytes
HTML transferred:       120000 bytes
Requests per second:    1833.56 [#/sec] (mean)
Time per request:       54.539 [ms] (mean)
Time per request:       0.545 [ms] (mean, across all concurrent requests)
Transfer rate:          367.07 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.3      0      20
Processing:     1   54   7.3     54     123
Waiting:        1   54   7.3     54     123
Total:          3   54   7.3     54     126

Percentage of the requests served within a certain time (ms)
  50%     54
  66%     56
  75%     58
  80%     58
  90%     61
  95%     64
  98%     69
  99%     70
 100%    126 (longest request)

springboot

ab  -n8000   -c 100 -r  http://127.0.0.1:8080/
......
Server Software:        
Server Hostname:        127.0.0.1
Server Port:            8080

Document Path:          /
Document Length:        11 bytes

Concurrency Level:      100
Time taken for tests:   0.879 seconds
Complete requests:      8000
Failed requests:        0
Total transferred:      1152000 bytes
HTML transferred:       88000 bytes
Requests per second:    9103.55 [#/sec] (mean)
Time per request:       10.985 [ms] (mean)
Time per request:       0.110 [ms] (mean, across all concurrent requests)
Transfer rate:          1280.19 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    5   1.4      5      18
Processing:     1    6   1.9      6      20
Waiting:        1    5   1.7      5      18
Total:          4   11   2.0     11      25

Percentage of the requests served within a certain time (ms)
  50%     11
  66%     11
  75%     12
  80%     12
  90%     13
  95%     13
  98%     15
  99%     22
 100%     25 (longest request)

结论

虽然python开发web应用没有java那么繁琐，无论是配置还是代码量开发效率，python都快一个级别，但是在对密集计算时，性能比不上java，大应用时，代码没有java那么一目了然，也是亏了java的web应用时结构性那么强，换一个程序员分分钟接手。当然这还是程序员个人的编码水平，换一个人写好的python代码，别人也能看的懂。
总的说，javaweb在性能上还是远胜python的

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