更新
这不应该是一个基准,或者节点与红宝石的事情(我应该在问题中更清楚地说明这一点,抱歉)。重点是比较和演示阻塞和非阻塞之间的区别以及编写非阻塞的难易程度。我可以比较一下使用 EventMachine 的例子,但是 node 有这个内置的,所以它是显而易见的选择。
我试图向一些朋友展示 nodejs(及其框架)相对于其他技术的优势,这种方式很容易理解,主要是非阻塞 IO 的事情。
所以我尝试创建一个(非常小的)Expressjs 应用程序和一个 Rails 应用程序,它会在 google 上执行 HTTP 请求并计算生成的 html 长度。
正如预期的那样(在我的电脑上)Expressjs 通过 ab 比 Rails 快 10 倍(见下文)。我的问题是,这是否是一种“有效”的方式来展示 nodejs 提供的优于其他技术的主要优势。(或者 Expressjs/Connect 中正在进行某种缓存?)
这是我使用的代码。
Expressjs
exports.index = function(req, res) {
var http = require('http')
var options = { host: 'www.google.com', port: 80, method: 'GET' }
var html = ''
var googleReq = http.request(options, function(googleRes) {
googleRes.on('data', function(chunk) {
html += chunk
})
googleRes.on('end', function() {
res.render('index', { title: 'Express', html: html })
})
});
googleReq.end();
};
导轨
require 'net/http'
class WelcomeController < ApplicationController
def index
@html = Net::HTTP.get(URI("http://www.google.com"))
render layout: false
end
end
这是 AB 基准测试结果
Expressjs
Server Software:
Server Hostname: localhost
Server Port: 3000
Document Path: /
Document Length: 244 bytes
Concurrency Level: 20
Time taken for tests: 1.718 seconds
Complete requests: 50
Failed requests: 0
Write errors: 0
Total transferred: 25992 bytes
HTML transferred: 12200 bytes
Requests per second: 29.10 [#/sec] (mean)
Time per request: 687.315 [ms] (mean)
Time per request: 34.366 [ms] (mean, across all concurrent requests)
Transfer rate: 14.77 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.1 0 0
Processing: 319 581 110.6 598 799
Waiting: 319 581 110.6 598 799
Total: 319 581 110.6 598 799
Percentage of the requests served within a certain time (ms)
50% 598
66% 608
75% 622
80% 625
90% 762
95% 778
98% 799
99% 799
100% 799 (longest request)
导轨
Server Software: WEBrick/1.3.1
Server Hostname: localhost
Server Port: 3001
Document Path: /
Document Length: 65 bytes
Concurrency Level: 20
Time taken for tests: 17.615 seconds
Complete requests: 50
Failed requests: 0
Write errors: 0
Total transferred: 21850 bytes
HTML transferred: 3250 bytes
Requests per second: 2.84 [#/sec] (mean)
Time per request: 7046.166 [ms] (mean)
Time per request: 352.308 [ms] (mean, across all concurrent requests)
Transfer rate: 1.21 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 180 387.8 0 999
Processing: 344 5161 2055.9 6380 7983
Waiting: 344 5160 2056.0 6380 7982
Total: 345 5341 2069.2 6386 7983
Percentage of the requests served within a certain time (ms)
50% 6386
66% 6399
75% 6402
80% 6408
90% 7710
95% 7766
98% 7983
99% 7983
100% 7983 (longest request)