据Bigmouthmedia的报道，我们看到了Google Sitemaps正在测试其新的功能，该项新功能允许网站主设定Google抓取网站的频率，你可以选择五个等级，从最慢到最快。也许将来开放该项新功能之后，我们可能会去选择最快，不过，快的代价是带宽的占用，有时并非越快越好。
我们可以看到Google的相关说明：
We are testing an alpha version of our new tool with a small percentage of webmasters who use Sitemaps. You should leave this control at the Normal setting unless you are having trouble with the speed at which Googlebot is crawling your server.
Simply select the rate at which you would like the Googlebot to crawl your server and click save. During this stage of testing, we will evaluate requests to determine the best way of using this data and providing this tool to everyone."
