Debugging a React Memory Leak With GPT-5 and Claude
A curated shared chat showing how to narrow a React memory leak, compare model feedback, and turn the result into a testable fix plan.
Summarize the symptom and recent code changes.
Ask one model for likely leak sources and another for missing instrumentation.
Turn overlapping advice into a minimal reproduction and test plan.
Keep only the fix steps that can be validated locally.
Shared Chat Excerpt
We see memory climb after opening and closing a modal 20 times. What should we inspect first?
Start with retained listeners, timers, subscriptions, and object URLs. Reproduce the modal loop with heap snapshots before and after close.
The modal registers a document keydown handler and creates image preview URLs.
Check that the effect cleanup removes the keydown listener with the same function reference and revokes every object URL when the modal closes or files change.
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