I’m having the same issues on my site as well. Even our Xenforo forum is affected as well. It’s taking 27.65 secs to load my site. Called 1&1 and they said it was a “compatibility issue.” They didn’t elaborate. They also blamed it on the plugins so I uninstalled all of them. No luck.
I definitely think 1&1 is having issues. They’re getting a lot of complaints on their Facebook page.