Vanguard is a provider of low cost index funds. Vanguard is all about simplifying the investing process. Vanguard is simple and straightforward. Vanguard's funds are simple and straightforward. Their website needs to be simple. But it is not. Since the last website update, it has been a pain going to their website.
I also filtered for the total CSS that comes thru. It is 48 KB.
So, a total of about 200KB of unnecessary (not really necessary) "stuff" comes over the wire when I go to check my fund prices. This is the reason site is too slow.