Wiki is very slow
https://eth.wiki/json-rpc/API takes more than 4 seconds to load on a 120Mbps connection on a machine with a Core i9 processor.
It scores a 7/100 on PageSpeed Insights for mobile, and 20/100 for Desktop (see: https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Feth.wiki%2Fjson-rpc%2FAPI&tab=desktop)
The same page hosted here on GitHub scored 74/100 and 99/100, respectively, and took under a second to load and render, uncached.
Each linked RPC method takes about 2-3 seconds to load due to the scrolling animation.
If you browse without JavaScript (in order to subvert the CPU-bound load time and scrolling animations) the page doesn't render at all.
The new JSON-RPC wiki page seems to add nothing of value over the old wiki (the aesthetics don't count).
Glad to see somebody else is having this problem. I had the same page open and it started eating up a full core in the background (i5-7600k) hours after I loaded it.