MYSQL数据库php+mysql prepare 与普通查询的性能对比实例讲解
《MYSQL数据库php+mysql prepare 与普通查询的性能对比实例讲解》要点: MYSQL必读php+mysql prepare 与普通查询的性能对比 MYSQL必读实例代码如下: MYSQL必读
<?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,10);
$StartSecond = substr($this->StartTime,11,10);
$StopMicro = substr($this->StopTime,10);
$StopSecond = substr($this->StopTime,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','ganbaobao_ucenter');
/*
$query = $mysql->query("select username,email from uc_members where uid < 100000");
$result = array();
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while($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);
}
$timer->stop();
echo '</br>预查询mysql运行100000条数据时间为: '.$timer->spent();
unset($timer);
//var_dump($result);
MYSQL必读运行结果: MYSQL必读普通mysql运行1000条数据时间为: 0.011621秒 MYSQL必读普通mysql运行10000条数据时间为: 0.07766891秒 MYSQL必读普通mysql运行100000条数据时间为: 0.10834217秒 MYSQL必读预查询mysql运行1000条数据时间为: 0.00963211秒 MYSQL必读预查询mysql运行10000条数据时间为: 0.04614592秒 MYSQL必读预查询mysql运行100000条数据时间为: 0.05989885秒 MYSQL必读感谢阅读,希望能赞助到大家,谢谢大家对本站的支持! 《MYSQL数据库php+mysql prepare 与普通查询的性能对比实例讲解》是否对您有启发,欢迎查看更多与《MYSQL数据库php+mysql prepare 与普通查询的性能对比实例讲解》相关教程,学精学透。编程之家PHP学院为您提供精彩教程。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |