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Debugging memory leaks in Node.js: a complete guide

Memory leaks in Node.js can turn a performant application into a nightmare.

Samuel Cardoso · 15 mars 2026 · 1 min de lecture

1. Identifying the symptoms

Memory leaks in Node.js applications often manifest insidiously. The first sign is usually a gradual increase in RAM consumption over time.

2. Diagnostic tools

Chrome DevTools remains the tool of choice for diagnosing memory leaks in Node.js. By launching your application with the --inspect flag, you gain access to the built-in memory profiler.

3. Remediation strategies

Once the leak has been identified, apply the principle of least privilege: release references as soon as they are no longer needed, and use WeakRef for caches.

SC
Samuel Cardoso Senior Software Developer
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