>I don't understand what kind of apps people are building with React that incur these significant rendering performance costs? I could understand it if you're b

>I don't understand what kind of apps people are building with React that incur these significant rendering performance costs? I could understand it if you're building a realtime cryptocurrency exchange dashboard but I don't think most people are doing that? I think it's just easy to make mistakes (bad loops, overly trigger-happy interpretations of "state change", etc), especially for all things "lists" (which make up half the web). Since people make mistakes, I'd always consider easy-to-make mistakes a design flaw, in this case affecting performance. Also there's a psychological cost to making incremental "loading" operations visible. Although some mysterious "research" is frequently cited that people just fucking LOVE spinning loading icons and gray placeholder boxes that are never where the actual content will pop in, it's just instantly making my perception of a site slower. If a website just takes 5 seconds to load, okay. If, during that time, it just pops in and out 50 components, 3 different loading bars, spinning whirlies and blurry placeholder images (where the one I actually want to see always loads last), I'm suddenly having a "delay experience". It's like a whole firework of bullshit happening to remind you the site HAS NOT loaded yet.