facebook/memlab

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

5030 stars · 144 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

MemLab is an end-to-end testing and analysis framework from Meta for detecting JavaScript memory leaks and optimization opportunities. It drives browser scenarios via Puppeteer, diffs heap snapshots, and provides programmatic heap traversal APIs plus a CLI toolbox and MCP server for AI assistants.

Use cases

• find memory leaks in a web app
• analyze v8 heap snapshots programmatically
• detect detached DOM nodes and event listener leaks
• write memory assertions in node.js unit tests
• find duplicate strings and oversized objects in the heap
• debug memory leaks interactively in the browser
• let AI coding assistants investigate heap snapshots via MCP

When to choose

• you need automated memory leak detection in browser or node.js apps
• you want to analyze heap snapshots from Chromium, Node.js, Electron, or Hermes
• you want memory regression checks in CI

When to avoid

• you need CPU or network profiling rather than heap analysis
• you work outside the JavaScript ecosystem

Facets

framework · maturity active

testing e2e-testing monitoring benchmarking developer-tools cli mcp developer-tools web-development testing performance frontend cli cross-platform memory-leak-detection heap-snapshot-analysis puppeteer v8 hermes electron memlens performance-analysis nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="facebook/memlab")