摘要：和還有共享內(nèi)存都是讀取內(nèi)存的數(shù)據(jù)，為了測(cè)試一下到底效率誰更勝一籌，我在我的虛擬機(jī)下做了一次公平的測(cè)試。

redis和memcache還有共享內(nèi)存都是讀取內(nèi)存的數(shù)據(jù)，為了測(cè)試一下到底效率誰更勝一籌，我在我的Centos虛擬機(jī)下做了一次公平的測(cè)試。

測(cè)試參數(shù)

環(huán)境：Centos （配置忽略）、語言：PHP、WebServer：Nginx、測(cè)試次數(shù)：10000、字符類型及長(zhǎng)度：字符串（1024）

準(zhǔn)備測(cè)試

 
  array ("id" => "4146","attacksdfdsfdsffffdffffdffffddd" => "5.45","atk_class" => "神圣級(jí)","wufang" => "4.9","def_class" => "超神級(jí)","cefang" => "4.9","mdf_class" => "超神級(jí)","hp" => "6.43","hp_class" => "神王級(jí)","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" => "神圣級(jí)","wufang" => "4.95","def_class" => "超神級(jí)","cefang" => "4.95","mdf_class" => "超神級(jí)","hp" => "6.43","hp_class" => "神王級(jí)","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(duì)redis進(jìn)行10000次寫入測(cè)試

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(zhí)行5次，大概平均結(jié)果為  1.7016470432281 秒

對(duì)共享內(nèi)存(shm)進(jìn)行10000次寫入測(cè)試

對(duì)redis進(jìn)行10000次讀測(cè)試
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(zhí)行5次，大概平均結(jié)果為 2.1236310005188 秒
對(duì)共享內(nèi)存(shm)進(jìn)行10000次讀測(cè)試

結(jié)果清單
Redis     讀：2.1秒             寫：1.7秒
Shm       讀：0.0021秒      寫：0.0025 秒
可見，效果差別懸殊。