php+mysql預查詢prepare 與普通查詢的效能對比

標籤：div   float   sql   time   blog   host   mail   資料庫服務   href   

prepare可以解決大訪問量的網站給資料庫伺服器所帶來的負載和開銷，本文章通過執行個體向大家介紹預查詢prepare與普通查詢的效能對比，需要的朋友可以參考一下。

執行個體代碼如下：

<?php  class timer {             public $StartTime = 0;             public $StopTime = 0;             public $TimeSpent = 0;                         function start(){                 $this->StartTime = microtime();             }                         function stop(){                 $this->StopTime = microtime();             }                         function spent() {                 if ($this->TimeSpent) {                 return $this->TimeSpent;                   } else {                   //  http://www.manongjc.com                $StartMicro = substr($this->StartTime,0,10);                     $StartSecond = substr($this->StartTime,11,10);                     $StopMicro = substr($this->StopTime,0,10);                     $StopSecond = substr($this->StopTime,11,10);                     $start = floatval($StartMicro) + $StartSecond;                     $stop = floatval($StopMicro) + $StopSecond;                     $this->TimeSpent = $stop - $start;                                return round($this->TimeSpent,8).‘秒‘;                 }            }       }    $timer = new timer;     $timer->start();      $mysql = new mysqli(‘localhost‘,‘root‘,‘root‘,‘ganbaobao_ucenter‘);    /* $query = $mysql->query("select username,email from uc_members where uid < 100000"); $result = array(); http://www.manongjc.com/article/1194.htmlwhile($result = $query->fetch_array()) {    $result[] = array(‘name‘=>$result[‘username‘],‘email‘=>$result[‘email‘]); } */  $query_prepare = $mysql->prepare("select username,email from uc_members where uid < ?");    $id = 100000;  $query_prepare->bind_param("i",$id);    $query_prepare->execute();  $query_prepare->bind_result($username,$email);    $result = array();  while($query_prepare->fetch())  {      $result[] = array(‘name‘=>$username,‘email‘=>$email);  }    $timer->stop();    echo ‘</br>預查詢mysql運行100000條資料時間為: ‘.$timer->spent();    unset($timer);    //var_dump($result);  

普通mysql運行1000條資料時間為: 0.011621秒

普通mysql運行10000條資料時間為: 0.07766891秒

普通mysql運行100000條資料時間為: 0.10834217秒

 

預查詢mysql運行1000條資料時間為: 0.00963211秒

預查詢mysql運行10000條資料時間為: 0.04614592秒

預查詢mysql運行100000條資料時間為: 0.05989885秒

php+mysql預查詢prepare 與普通查詢的效能對比