I am seeing also 6+ seconds TTFB.
Is it possible it has something to do with redirects?
On why-bitcoin.rocks I have no redirect and the site loads fast.
On dalliard.ch I have a redirect from the homepage to the default /de/ and the site takes the 6+ seconds to load.
Maybe that helps.
Edit: I can confirm my thesis, I just removed the redirect from / to /en/ on dalliard.ch and it now loads instantly. It’s build with Hugo and in the
config.toml file I had
defaultContentLanguageInSubdir = true. With
false it seems I got rid of the 6s delay. Don’t know why.