Memory Leak After Cursor Refactored Cleanup Code
Your application has developed a memory leak after Cursor refactored cleanup code. Memory usage increases over time and never decreases, eventually causing crashes or slowdowns.
Event listeners or subscriptions are not being properly cleaned up.
Error Messages You Might See
Common Causes
- useEffect cleanup function removed or broken
- Event listener added but never removed (addEventListener without removeEventListener)
- Subscription created but not unsubscribed (Observable)
- Timers (setInterval/setTimeout) not cleared
- References held to DOM nodes preventing garbage collection
How to Fix It
useEffect cleanup returns function: useEffect(() => { return () => cleanup; }, []). Remove listeners: window.removeEventListener('scroll', handler). Clear timers: clearInterval(id). Unsubscribe: subscription.unsubscribe(). Use Chrome DevTools Memory tab to detect leaks.
Real developers can help you.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Nam Tran
10 years as fullstack developer
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I detect memory leaks?
Chrome DevTools Memory tab. Take heap snapshots. Compare before/after action. Look for growing detached DOM nodes.
What's a WeakMap?
Map that holds weak references. Allows garbage collection if key is no longer referenced elsewhere. Useful for metadata on objects.