Centos下10000次循環測試php對Redis和共享內存(shm)讀寫效率

redis和memcache還有共享內存都是讀取內存的數據，爲了測試一下到底效率誰更勝一籌，我在個人Centos虛擬機下作了一次公平的測試。

測試參數

環境：Centos （配置忽略）、語言：PHP、WebServer：Nginx、測試次數：10000、字符類型及長度：字符串（1024）

準備測試

<?php
//測試數據
$arr = array( 1 => 
  array ('id' => '4146','attacksdfdsfdsddddddddddd' => '5.45','atk_class' => '神聖級','wufang' => '4.9','def_class' => '超神級','cefang' => '4.9','mdf_class' => '超神級','hp' => '6.43','hp_class' => '神王級','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' => '神聖級','wufang' => '4.95','def_class' => '超神級','cefang' => '4.95','mdf_class' => '超神級','hp' => '6.43','hp_class' => '神王級','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);          //輸出1024

對redis進行10000次寫入測試

<?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;    //執行5次，大概平均結果爲  1.7016470432281 秒

對共享內存(shm)進行10000次寫入測試

<?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;  //執行5次，大概平均結果爲 0.0025370121002197 秒

對redis進行10000次讀測試

<?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;     //執行5次，大概平均結果爲 2.1236310005188 秒

對共享內存(shm)進行10000次讀測試

<?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;     //執行5次，大概平均結果爲 0.0021078586578369 秒

結果清單

Redis 讀：2.1秒 寫：1.7秒

Shm 讀：0.0021秒 寫：0.0025 秒

可見，效果差異懸殊。