Centos下10000次循环测试php对Redis和共享内存(shm)读写效率

摘要：和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，我在我的虚拟机下做了一次公平的测试。

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

 
  array ("id" => "4146","attacksdfdsfdsffffdffffdffffddd" => "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

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

对redis进行10000次读测试
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

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。