Page took over a minute to load, something bizarre is going on there. When I looked at the HTML source it looks complete.
When I looked at it with curl and this is all I got back:
<!-- Page not cached by WP Super Cache. No closing HTML tag. Check your theme. -->
Using wget I eventually got the HTML
$ wget https://www.oldrow.net/index.php
--21:54:03-- https://www.oldrow.net/index.php
=>
index.php
Resolving www.oldrow.net... 216.97.231.10
Connecting to www.oldrow.net|216.97.231.10|:80... connected.
HTTP request sent, awaiting response... 301
Location: https://oldrow.net/ [following]
--21:54:04-- https://oldrow.net/
=> index.html
Resolving oldrow.net... 216.97.231.10
Connecting to oldrow.net|216.97.231.10|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
[ <=> ] 90,842 321.42K/s
21:55:36 (321.41 KB/s) - index.html saved [90842]
Started at 21:54:03 and completed at 21:55:36. Not cool.
Try the usual and disable all plugins and switch to the default theme. If you get your performance back, put back the theme and plugin till you hit the problem.