シンプルなWSGIサーバ picows

WSGIサーバの勉強がてらシンプルなWSGIサーバを書き始めした。
まだ全然できてませんけど。

特徴

シングルスレッド
非同期
WSGIのみサポート

これだけです。シンプルです。
呼び出しもシンプルでひとつのwsgi appしか載せられません。

他にもシンプルな理由は「全部Cで書いてある」って点もあるかも知れません。
ファイルもpicows.soのみです。

技術要素

picoevベース
ragelで吐いたrequest parser
一部のObjectはヒープに直接のっける
cStringIOのAPIを直接使用

一応少しはパフォーマンスに気を使っています。
ragelベースの簡易HTTPパーサーなのでチャンクとかそういうのできません。

パフォーマンス

まだ細かい部分はできてないです、びみょーですけど。
まだロギングしてないので、同様なfapws3と単純なhello worldで比較してみます。
（それでも平等ではないですが。。。fapws3はlibevベースのWSGIサーバ）

picows

import picows

def simple_app(environ, start_response):
    status = '200 OK'
    response_headers = [('Content-type','text/plain')]
    start_response(status, response_headers)
    return ['Hello world!\n']

picows.listen("0.0.0.0", 8000)
picows.run(simple_app)

picows ab

Benchmarking 0.0.0.0 (be patient)

Server Software:
Server Hostname: 0.0.0.0
Server Port: 8000
Document Path: /
Document Length: 13 bytes
Concurrency Level: 100
Time taken for tests: 2.863 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 780078 bytes
HTML transferred: 130013 bytes
Requests per second: 3492.37 [#/sec] (mean)
Time per request: 28.634 [ms] (mean)
Time per request: 0.286 [ms] (mean, across all concurrent requests)
Transfer rate: 266.05 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 4 3.5 3 33
Processing: 12 25 5.7 24 86
Waiting: 7 23 5.4 23 86
Total: 23 28 5.7 26 87
Percentage of the requests served within a certain time (ms)
50% 26
66% 28
75% 30
80% 30
90% 32
95% 34
98% 48
99% 59
100% 87 (longest request)

fapws3

import fapws._evwsgi as evwsgi
from fapws import base

    
def hello(environ, start_response):
    start_response('200 OK', [('Content-Type','text/html')])
    return ["hello world!!"]

evwsgi.start("0.0.0.0", 8000)
evwsgi.set_base_module(base)

evwsgi.wsgi_cb(("/", hello))
evwsgi.run()

fapws3 ab

Benchmarking 0.0.0.0 (be patient)

Server Software: fapws3/0.3
Server Hostname: 0.0.0.0
Server Port: 8000
Document Path: /
Document Length: 13 bytes
Concurrency Level: 100
Time taken for tests: 6.899 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 1140000 bytes
HTML transferred: 130000 bytes
Requests per second: 1449.51 [#/sec] (mean)
Time per request: 68.989 [ms] (mean)
Time per request: 0.690 [ms] (mean, across all concurrent requests)
Transfer rate: 161.37 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 5.2 0 55
Processing: 10 67 15.4 65 128
Waiting: 4 65 15.4 63 126
Total: 27 68 13.8 65 128
Percentage of the requests served within a certain time (ms)
50% 65
66% 67
75% 69
80% 72
90% 90
95% 98
98% 108
99% 115
100% 128 (longest request)

Tornadoはロギングが入ってるので平等ではないのですが、一応のせておきます。
使用したのはdemoのhello worldです。

TornadoServer

Benchmarking 0.0.0.0 (be patient)

Server Software: TornadoServer/0.1
Server Hostname: 0.0.0.0
Server Port: 8888
Document Path: /
Document Length: 12 bytes
Concurrency Level: 100
Time taken for tests: 18.469 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 1680000 bytes
HTML transferred: 120000 bytes
Requests per second: 541.46 [#/sec] (mean)
Time per request: 184.687 [ms] (mean)
Time per request: 1.847 [ms] (mean, across all concurrent requests)
Transfer rate: 88.83 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 2 3.0 2 58
Processing: 108 181 26.5 173 374
Waiting: 107 180 26.5 172 374
Total: 116 183 27.0 175 375
Percentage of the requests served within a certain time (ms)
50% 175
66% 180
75% 187
80% 192
90% 202
95% 227
98% 265
99% 322
100% 375 (longest request)

http://bitbucket.org/mopemope/picows/

Doge log

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