Slow Site and SSL?

That’s not SSL that’s slowing your site down. SSL clears in 24 ms, which is super quick. It’s just waiting for your server to send the HTML. A WordPress caching plugin should help with this. I use WP Fastest Cache, but W3 Total Cache is also a good one.

As a side note, if I just type in sagrasorio.it, I get a 502, like your server doesn’t respond to non-www. If you can’t fix it at the server’s end, you can add a Page Rule at Cloudflare to match sagrasorio.it/* and set it to Forward (Code 301) to https://www.sagrasorio.it/$1