Implemented caching on some sites. *Updated 05/18
There's the popular CloudFlare now, but in the past, it was positioned as a dark hero for illegal sites, hiding servers. However, after being placed under regulation, it has risen to become a respectable company.
As a CDN service, it boasts free website acceleration through caching and also comes with a site blocking function (DDoS protection)...
I feel a bit of aversion to this, as it reminds me of a honeypot node on Tor, so personally, I don't really want to use it. Also, because it relies on CloudFlare's servers, if CloudFlare's servers experience an outage, everything goes down.
In fact, a problem occurred in 2022, which is a bit concerning.
So, since I haven't experienced a DDoS attack so far, and only considering using caching, I tried implementing only some caching features on the site I operate, without using CloudFlare.
Until now, I thought problems would occur when there were changes within the site, but I wonder if it functions like PC memory, conceptually. Thinking that, I started reconsidering CloudFlare and came to this conclusion, but this site doesn't use it.
※05/18 - Having said that, I added it. I made various other adjustments, but as a benchmark enthusiast, I'm satisfied.

The reason is that this is a text-main site. I wonder if it's more convenient for sites that use a lot of images.
※05/18 - Nevertheless, optimization is important.