Cursor
performance
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
Out of memory
Heap size exceeded
Memory usage increasing
Process killed
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.
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Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
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SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Antriksh Narang
5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies.
Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
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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.
Luca Liberati
I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture
Matt Butler
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Victor Denisov
Developer
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
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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.