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

測試數據

<?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。