作用：输入（多个）网址或者域名，测试网页访问所需要的时间。

可以用于网站很多的站长，一次性查询自己所有网站是否可用以及载入时间。

这是个非常实用的查询系统，他几很少耗费服务器资源，每个站长都可以收藏一个。

风险提示：如果公开查询了非法网站，你的域名可能会被记录而被安全软件拦截。 -Role: enter (multiple) web site or domain name, the time required to test web access.

Can be used for a lot of webmasters site, a one-time query all their sites are available and the loading time.

This is a very useful query system, he rarely spent server resources, each webmaster can collect a.

Risk tip: if you open up an illegal website, your domain name may be recorded and intercepted by security software.