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请教为什么PDO->construct这么耗时啊？

WBOY
Release： 2016-06-20 12:35:40
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我做了一个页面，分页刷新数据非常慢，左右想不通，后来用webgrind分析了一下发现PDO->__construct这个构造函数执行的非常慢，都要1秒钟了。非常疑惑，这个函数怎么这么慢，把图片贴上来，请大神指教。


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PDO::__construct 将完成数据库连接的操作

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请教为什么PDO->construct这么耗时啊？
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