WhichLoadsFaster:网站打开速度对比测试工具是一个免费在线测试不同网站之间打开加载速度的测试工具，站长可以把自己的网站和同类网站进行比较，查看谁的网站速度、加载效果更加优秀。

使用方法很简单，打开这个在线工具之后，输入两个网址，它就会同时载入，最后会告诉你比较结果，以及两者差距究竟有多大。比较的结果会显示在网页中间，上面会告诉你，网页加载完毕分别用了多少毫秒，两者差了多少倍。

网站加载时间是会受到DNS、线路、缓存、访问人数等许多因素的影响，多次测试取平均值才能够更加贴近实际情况。用户点击网页顶部的repeat选项来设置测试的次数和时间。

whichloadsfaster is a fun way to spread the word that web performance matters. It's about friendly competition and about testing in everybody's browser, not just ones that have nice performance tools already.

whichloadsfaster is open source, written in HTML and JavaScript and runs entirely on the client-side. You can host the files on your own site and tweak them to suit your own nefarious plans. We promise not to tell.