Python flask 与 GO WEB服务器性能对比

测试环境：

• 系统： CentOS 7.1
• Mem: 8G
• CPU: 虚拟机16核
• Python版本： python3.6
• Flask版本： 0.12.2
• Golang版本： 1.6.3

1.首先写一个Flask的web程序，只返回一个 Hello word!

from flask import Flask, render_template app = Flask(__name__) @app.route('/') def hello_world(): return 'Hello word!' if __name__ == '__main__': app.run()

2.写一个go语言的web程序，也返回一个 Hello word!

package main

import ( f "fmt" "log" "net/http" ) func sayhelloName(w http.ResponseWriter, r *http.Request) { f.Fprintln(w, "hello world!") } func main() { http.HandleFunc("/", sayhelloName) err := http.ListenAndServe(":8080", nil) if err != nil { log.Fatal("ListenAndServe:", err) } }

3.直接在控制台启动Flask, 用压力测试工具模拟并发请求。这里模拟100个并发100000个请求。

ab -n 100000 -c 100 "http://172.30.200.88:5000/"

Server Software:        Werkzeug/0.12.2 Server Hostname: 172.30.200.88 Server Port: 5000 Document Path: / Document Length: 11 bytes Concurrency Level: 100 Time taken for tests: 88.441 seconds Complete requests: 100000 Failed requests: 0 Write errors: 0 Total transferred: 16500000 bytes HTML transferred: 1100000 bytes Requests per second: 1130.70 [#/sec] (mean) Time per request: 88.441 [ms] (mean) Time per request: 0.884 [ms] (mean, across all concurrent requests) Transfer rate: 182.19 [Kbytes/sec] received

4.用Gunicorn以8个进程启动flask，再以同样的并发测试一遍

Server Software:        gunicorn/19.7.1 Server Hostname: 172.30.200.88 Server Port: 8080 Document Path: / Document Length: 11 bytes Concurrency Level: 100 Time taken for tests: 15.842 seconds Complete requests: 100000 Failed requests: 0 Write errors: 0 Total transferred: 17100000 bytes HTML transferred: 1100000 bytes Requests per second: 6312.50 [#/sec] (mean) Time per request: 15.842 [ms] (mean) Time per request: 0.158 [ms] (mean, across all concurrent requests) Transfer rate: 1054.14 [Kbytes/sec] received

5.以同样的并发测试Go

Server Software:        
Server Hostname:        172.30.200.88 Server Port: 8080 Document Path: / Document Length: 13 bytes Concurrency Level: 100 Time taken for tests: 12.460 seconds Complete requests: 100000 Failed requests: 0 Write errors: 0 Total transferred: 13000000 bytes HTML transferred: 1300000 bytes Requests per second: 8025.80 [#/sec] (mean) Time per request: 12.460 [ms] (mean) Time per request: 0.125 [ms] (mean, across all concurrent requests) Transfer rate: 1018.90 [Kbytes/sec] received

测试结果：
Flask 总耗时 88.441秒，平均每秒处理1130个请求
Gunicorn多进程时耗时 15.842， 平均每秒处理 6312个请求
Go 总耗时 12.46秒，每秒处理 8025个请求

相比之下 go跟gunicorn的处理速度有提升，但是并没有像传说中十倍的性能。在测试中还发现，在用flask的时候并不能支持大并发，当并发在200以上就很容易报错了， 而Golang的并发到1000都能正常运行，这一点上差距比较大。