apache ab测试并发多次实例与单次实例

请求5000次，并发数1000

实例化1次和实例化5次

结果：相差5秒，即并发相差5毫秒（ 15815.625毫秒， 20234.375毫秒 ）

总结：其实有这个差距，也就是因为5次实例化，多了4次的处理数据，处理数据越大，速度肯定是越慢。所以很多服务器都会有专门的图片服务器，以减轻服务器的压力。网站服务器专门用来输出文字。

<?php
/**
 *类名:A
 *主要功能：从0-1000的数字相加
 *5000请求，1000次并发  实例化1次。结果在最下方
 *ab -n 5000 -c 1000 http://192.168.57.131/abnewc/a.php
 */

 class a
 {
	public $counts = 0;
	
	function __construct()
	{
		$this->init();
	}
	
	private function init()
	{
		for($i = 0; $i < 1000; $i++)
		{
			$this->counts = $this->counts + $i;
		}
		
	}
 }
 
 
 $last_time = time();
 $a1 = new a;
 $diff_time = time() - $last_time;
 
 echo('类a运行0-1000的数字相加，被实例化2次，5000请求并发数1<br><br>');
 echo('运行时间：'.$diff_time.'秒');
 
 
/**
C:\wamps\bin\apache\Apache2.2.21\bin>ab -n 5000 -c 1000 http://192.168.57.131/abnewc/a.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.57.131 (be patient)
Completed 500 requests
Completed 1000 requests
Completed 1500 requests
Completed 2000 requests
Completed 2500 requests
Completed 3000 requests
Completed 3500 requests
Completed 4000 requests
Completed 4500 requests
Completed 5000 requests
Finished 5000 requests


Server Software:        Apache/2.2.12
Server Hostname:        192.168.57.131
Server Port:            80

Document Path:          /abnewc/a.php
Document Length:        74 bytes

Concurrency Level:      1000
Time taken for tests:   79.078 seconds
Complete requests:      5000
Failed requests:        0
Write errors:           0
Total transferred:      1420000 bytes
HTML transferred:       370000 bytes
Requests per second:    63.23 [#/sec] (mean)
Time per request:       15815.625 [ms] (mean)
Time per request:       15.816 [ms] (mean, across all concurrent requests)
Transfer rate:          17.54 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   16 209.5      0    3109
Processing:    78 13701 4074.6  15625   21563
Waiting:       31 8055 4706.7   6609   18656
Total:         78 13717 4074.7  15625   21563

Percentage of the requests served within a certain time (ms)
  50%  15625
  66%  15781
  75%  15828
  80%  15984
  90%  16125
  95%  16234
  98%  18750
  99%  21531
 100%  21563 (longest request)
 

<?php
/**
 *类名:A
 *主要功能：从0-1000的数字相加
 *5000请求，1000次并发  实例化5次。结果在最下方
 *ab -n 5000 -c 1000 http://192.168.57.131/abnewc/b.php
 */

 class a
 {
	public $counts = 0;
	
	function __construct()
	{
		$this->init();
	}
	
	private function init()
	{
		for($i = 0; $i < 1000; $i++)
		{
			$this->counts = $this->counts + $i;
		}
		
	}
 }
 
 
 $last_time = time();
 $a1 = new a;
 $a2 = new a;
 $a3 = new a;
 $a4 = new a;
 $a5 = new a;
 $diff_time = time() - $last_time;
 
 echo('类a运行0-1000的数字相加，被实例化2次，5000请求并发数1000<br><br>');
 echo('运行时间：'.$diff_time.'秒');
 
 
/**
C:\wamps\bin\apache\Apache2.2.21\bin>
C:\wamps\bin\apache\Apache2.2.21\bin>ab -n 5000 -c 1000 http://192.168.57.131/abnewc/b.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.57.131 (be patient)
Completed 500 requests
Completed 1000 requests
Completed 1500 requests
Completed 2000 requests
Completed 2500 requests
Completed 3000 requests
Completed 3500 requests
Completed 4000 requests
Completed 4500 requests
Completed 5000 requests
Finished 5000 requests


Server Software:        Apache/2.2.12
Server Hostname:        192.168.57.131
Server Port:            80

Document Path:          /abnewc/b.php
Document Length:        77 bytes

Concurrency Level:      1000
Time taken for tests:   101.172 seconds
Complete requests:      5000
Failed requests:        0
Write errors:           0
Total transferred:      1435000 bytes
HTML transferred:       385000 bytes
Requests per second:    49.42 [#/sec] (mean)
Time per request:       20234.375 [ms] (mean)
Time per request:       20.234 [ms] (mean, across all concurrent requests)
Transfer rate:          13.85 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   20 234.6      0    3125
Processing:   141 18164 5689.0  19406   43797
Waiting:       47 10633 5939.5   9719   43781
Total:        141 18184 5690.2  19406   43813

Percentage of the requests served within a certain time (ms)
  50%  19406
  66%  21203
  75%  21828
  80%  21922
  90%  22000
  95%  24344
  98%  24625
  99%  24719
 100%  43813 (longest request)