What causes most Puppeteer memory leaks in Node.js?

Chrome child processes retaining page DOM, screenshots in external memory, or undisposed event listeners. Not Node heap usually.

How do you profile Puppeteer memory usage step by step?

Baseline logs, time-series tracker, load test, heap snapshots via Chrome DevTools, diff for retainers.

Absolutely – RSS grows silently, triggers OOMKill after hours. Track Chrome PIDs separately.

⚙️ DevOps & Platform Eng

Your Puppeteer bot runs fine for 10 minutes, then balloons to 2GB and gets OOM-killed. Sound familiar? Time to profile like a pro, not guess.

DevTools Feed Apr 03, 2026 3 min read 16 views

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Puppeteer's leaks hide in Chrome child processes, not Node heap – monitor RSS and external first. 𝕏
Use JSONL time-series tracking and heap diffs to pinpoint retainers like rogue pages. 𝕏
Recycle browsers, ruthless page closes, and lean args prevent 90% of OOM kills. 𝕏

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#Node.js profiling #heap snapshots #memory leaks #puppeteer

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Originally reported by dev.to