redis和memcache还有共享内存都是读取内存的数据,为了测试一下到底效率谁更胜一筹,我在我的Centos虚拟机下做了一次公平的测试。

测试参数

环境:Centos (配置忽略)、语言:PHP、WebServer:Nginx、测试次数:10000、字符类型及长度:字符串(1024)

准备测试

测试数据

<?php 
//测试数据 
$arr = array( 1 =>  
  array ('id' => '4146','attacksdfdsfdsddddddddddd' => '5.45','atk_class' => '神圣级','wufang' => '4.9','def_class' => '超神级','cefang' => '4.9','mdf_class' => '超神级','hp' => '6.43','hp_class' => '神王级','dodge' => '55','dodge_class' => 'SSSS','crit' => '50','crit_class' => 'SSS','penetrate' => '55','penetrate_class' => 'SSSS','mingzhong' => '51','hit_class' => 'SSSS','anti_dizziness' => '0','anti_dizzinesssdfdsfdsfdsfdsfds_class' => 'F','anti_critical' => '20','anti_critical_class' => 'F','tenacity' => '0','tenacity_class' => 'F', 
  ), 
  2 =>  
  array ('id' => '414ddffff7','attack' => '5.45','atk_class' => '神圣级','wufang' => '4.95','def_class' => '超神级','cefang' => '4.95','mdf_class' => '超神级','hp' => '6.43','hp_class' => '神王级','dodge' => '55','dodge_class' => 'SSSS','crit' => '50','crit_class' => 'SSS','penetrate' => '55','penetrate_class' => 'SSSS','mingzhong' => '51','hit_class' => 'SSSS','anti_dizziness' => '0','anti_dizziness_clsdfdsfdsfdsfdsfdsass' => 'F','anti_critical' => '20','anti_critical_class' => 'F','tenacity' => '0','tenacity_class' => 'F', 
  )); 
 
$str = json_encode($arr); 
echo strlen($str);          //输出1024

对redis进行10000次写入测试

<?php 
$redis = new Redis(); 
$redis->connect('127.0.0.1',6379); 
$redis->auth('310c8cabcdefghf2d8abcdefd44496ac80'); 
$start = microtime(true) ; 
 
for($i = 0; $i<10000; $i++) { 
    $redis->set('key', $str); 
} 
echo microtime(true) - $start;    //执行5次,大概平均结果为  1.7016470432281 秒

对共享内存(shm)进行10000次写入测试

<?php 
$key = 0x4337b123;   
$size = 1024;   
$shmid = @shmop_open($key, 'c', 0644, $size);   
$start = microtime(true); 
for($i = 0; $i<10000; $i++) { 
    shmop_write($shmid, $str, 0);  
} 
@shmop_close($shmid); 
echo microtime(true) - $start;  //执行5次,大概平均结果为 0.0025370121002197 秒

对redis进行10000次读测试

<?php 
$redis = new Redis(); 
$redis->connect('127.0.0.1',6379); 
$redis->auth('310c8cabcdefghf2d8abcdefd44496ac80'); 
$start = microtime(true) ; 
 
for($i = 0; $i<10000; $i++) { 
    $redis->get('key'); 
} 
echo microtime(true) - $start;     //执行5次,大概平均结果为 2.1236310005188 秒

对共享内存(shm)进行10000次读测试

<?php 
$key = 0x4337b123;   
$size = 1024;   
$shmid = @shmop_open($key, 'c', 0644, $size);   
$start = microtime(true); 
for($i = 0; $i<10000; $i++) { 
    shmop_read($shmid, 0,1024); 
} 
@shmop_close($shmid); 
echo microtime(true) - $start;     //执行5次,大概平均结果为 0.0021078586578369 秒

结果清单

Redis     读:2.1秒             写:1.7秒

Shm       读:0.0021秒      写:0.0025 秒

可见,效果差别悬殊。

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php实现共享内存进程通信函数之_shm详解
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