Same. I stopped reading halfway through because I'm on battery and don't want to run it down just reading a blog post. Also I got tired of the fan noise.
Same, around 40-50% CPU in Brave (MacOS), and the article is more or less useless with JS disabled.. ಠ_ಠ
Yeah, disabling JS fixed it but then you can't see any of the code snippets.
Probably some janky bit of JS watching the scroll too frequently so that the little clippy guy can pop up and ask if you want to see his latest project