Python flask 與 GO WEB服務器性能對比

測試環境：

• 系統： CentOS 7.1
• Mem: 8G
• CPU: 虛擬機16核
• Python版本： python3.6
• Flask版本： 0.12.2
• Golang版本： 1.6.3

1.首先寫一個Flask的web程序，只返回一個 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.寫一個go語言的web程序，也返回一個 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.直接在控制台啟動Flask, 用壓力測試工具模擬並發請求。這里模擬100個並發100000個請求。

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個進程啟動flask，再以同樣的並發測試一遍

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.以同樣的並發測試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

測試結果：
Flask 總耗時 88.441秒，平均每秒處理1130個請求
Gunicorn多進程時耗時 15.842， 平均每秒處理 6312個請求
Go 總耗時 12.46秒，每秒處理 8025個請求

相比之下 go跟gunicorn的處理速度有提升，但是並沒有像傳說中十倍的性能。在測試中還發現，在用flask的時候並不能支持大並發，當並發在200以上就很容易報錯了， 而Golang的並發到1000都能正常運行，這一點上差距比較大。