HHVM vs PHP-FPM

hhvm-vs-php_fpm.md

HHVM vs PHP-FPM

〇 基准性能测试

因 HHVM 会篡改 phpinfo() 函数输出结果，因此使用最基本的 echo 'Hello World!'; 进行测试。

0.1 测试环境

在 OS X 10.9.3 使用 VirtualBox 4.3.12 r93733 创建虚拟机，配置如下：

# uname -a
Linux sandbox-1 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u2 x86_64 GNU/Linux

# dpkg -l
||/ Name                                   Version                  Architecture
+++-======================================-========================-============
ii  nginx-full                             1.4.6-1~dotdeb.1         amd64
ii  php5-fpm                               5.5.10-1~dotdeb.1        amd64
ii  hhvm                                   3.1.0~wheezy             amd64

# free -h
             total
Mem:          496M
Swap:         487M

# # grep 'processor\s*:' /proc/cpuinfo | wc -l
2

# ulimit -n
65535

# cat /etc/nginx/nginx.conf
worker_processes 2;
	worker_connections 1024;
	keepalive_timeout 15;
	
# cat /etc/php5/fpm/pool.d/www.conf
listen.backlog = 4096
pm = static
pm.max_children = 4

$ ab -V
This is ApacheBench, Version 2.3 <$Revision: 655654 $>

0.2 测试结果

统一使用 ab -c 100 -n 10000 http://127.0.0.1/ 度量。

每次测试前，确认服务为新启动，且网络链接情况恢复正常。

PHP-FPM

1. TCP

   Time taken for tests:   5.366 seconds
   Failed requests:        0
   Write errors:           0
   Requests per second:    1863.51 [#/sec] (mean)
   Time per request:       53.662 [ms] (mean)
   
   Connection Times (ms)
                 min  mean[+/-sd] median   max
   Connect:        0    3   4.5      1      24
   Processing:     5   50  13.4     50      98
   Waiting:        5   48  13.7     48      98
   Total:         13   53  11.3     53      98
   
   Percentage of the requests served within a certain time (ms)
     50%     53
     75%     58
     90%     66
     98%     84
    100%     98 (longest request)
   

2. Unix Socket

   Time taken for tests:   4.231 seconds
   Failed requests:        0
   Write errors:           0
   Requests per second:    2363.37 [#/sec] (mean)
   Time per request:       42.312 [ms] (mean)
   
   Connection Times (ms)
                 min  mean[+/-sd] median   max
   Connect:        0    7   5.6      6      27
   Processing:     4   35  10.5     34      83
   Waiting:        4   32  10.9     31      83
   Total:         14   42   8.0     41      83
   
   Percentage of the requests served within a certain time (ms)
     50%     41
     75%     47
     90%     54
     98%     60
    100%     83 (longest request)
   

HHVM

为真实展现 HHVM 处理能力，按照其官方文档，在 Nginx 配置中启用了 fastcgi_keep_conn 指令。

1. TCP

   Time taken for tests:   7.788 seconds
   Failed requests:        0
   Write errors:           0
   Requests per second:    1284.09 [#/sec] (mean)
   Time per request:       77.876 [ms] (mean)
   
   Connection Times (ms)
                 min  mean[+/-sd] median   max
   Connect:        0    0   1.0      0      16
   Processing:    14   77   5.7     76     109
   Waiting:       14   77   5.7     76     109
   Total:         29   78   5.6     77     113
   
   Percentage of the requests served within a certain time (ms)
     50%     77
     75%     80
     90%     85
     98%     90
    100%    113 (longest request)
   

2. Unix Socket

   Time taken for tests:   7.615 seconds
   Failed requests:        0
   Write errors:           0
   Requests per second:    1313.28 [#/sec] (mean)
   Time per request:       76.145 [ms] (mean)
   
   Connection Times (ms)
                 min  mean[+/-sd] median   max
   Connect:        0    1   1.1      1      13
   Processing:    53   75   5.9     75     117
   Waiting:       53   74   5.8     74     116
   Total:         54   76   6.2     76     125
   
   Percentage of the requests served within a certain time (ms)
     50%     76
     75%     79
     90%     82
     98%     93
    100%    125 (longest request)
   

0.3 摘要对比

	PHP-FPM		HHVM
	TCP	Unix Socket	TCP	Unix Socket
Requests per second [#/sec]	1863.51	2363.37	1284.09	1313.28
Time per request [ms]	53.662	42.312	77.876	76.145
... 98% [ms]	84	60	90	93