How to Fix Memory Usage High in AI-Built Apps
Your application consumes excessive memory, leading to crashes and OOM kills. AI-generated code often creates memory leaks through uncleared intervals, event listeners, and accumulated data.
Error messages you might see
FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memoryError: Process exited with signal SIGKILL (OOM)Why this happens in AI-generated code
Memory leaks in event listeners
AI code adds event listeners or subscriptions without cleanup functions, accumulating over time.
Unbounded data structures
In-memory caches or arrays grow without limits, eventually consuming all available memory.
Large file processing in memory
AI code reads entire files into memory instead of using streams for processing.
How to fix it
Add cleanup to effects and listeners
Return cleanup functions from useEffect hooks. Remove event listeners in componentWillUnmount or AbortController signals.
Use streams for large data
Process large files and datasets with Node.js streams or async iterators instead of loading everything into memory.
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Frequently asked questions
How do I detect memory leaks in Node.js?
Use `--inspect` flag with Chrome DevTools to take heap snapshots, or use `clinic.js` for automated profiling.
What is a normal memory usage for a Node.js app?
A typical Express/Next.js app should use 100-300MB. If it grows continuously over time, you likely have a leak.
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