RetentaRetenta

Evidence record · captured 2026-10-10

Cloudflare Workers Profiling

A production profiling workflow for locating CPU and heap hotspots in deployed Workers and Durable Objects and tying pprof evidence back to the smallest code change.

Official publisherUnverifiedSource reviewedBehavior not tested
Source review

Editorial assessment

This is a source-only assessment. It does not claim runtime or security testing.

What it does

This concise skill scopes a production symptom, captures a supported CPU or heap profile, maps hotspots to source when symbols allow, and asks for the smallest evidence-backed optimization plus a verification plan.

Best for

  • CPU-bound Worker latency
  • Heap allocation or memory-growth investigation
  • Durable Object hotspots tied to a deployed version

Strengths in the source

  • Requires exact account, Worker, environment, and version context before capture.
  • Keeps findings attached to profile metrics, functions, and source locations.
  • Treats missing symbols or source maps as an evidence gap rather than guessing.

Limitations

  • It depends on production access and a profiling interface supported by the current platform.
  • The SKILL.md offers little guidance for statistical interpretation beyond pprof inspection.
  • No capture or optimization was performed for this catalog review.

When not to use it

  • General code cleanup without a measured CPU or memory symptom
  • A local runtime that is not deployed on Cloudflare Workers

Reviewed by Retenta editorial on 2026-10-10; scope: source only.

Files included in this review
  • skills/workers-profiling/SKILL.md
  • README.md
  • LICENSE

Evidence and boundaries

Execution · not tested

Retenta reviewed the pinned source but did not install or execute this skill.

Security · not tested

No sandbox run, dependency audit, or independent security assessment is claimed.

Pinned publisher source
skills/workers-profiling/SKILL.md
Revision
c430dd965cea3a8faf0ef035e3b3d73b38518081
License evidence
Apache-2.0The pinned repository root LICENSE is the Apache License, Version 2.0.
Last source change
2026-10-10
Independent verification
The source is controlled by Cloudflare; Retenta has not independently verified its runtime behavior or security.
Upstream repository
Open publisher repository

Compatibility

Agent Skills clients

documented

Cloudflare documents installation paths for Codex, Claude Code, VS Code/Copilot, Cursor, and other Agent Skills clients.

Requirements and access

  • A deployed Worker or Durable Object
  • The target account, environment, version, and workload
  • Permission and tooling to capture a production profile

Referenced tools

Cloudflare cf CLIpprof

Install from the source

Cloudflare documents this command for agents that support the Agent Skills standard; it installs the repository collection, not only this record.

Download the pinned SKILL.md Apache-2.0 license text
Verify the publisher's install documentation

More Cloudflare skills →

Publisher-documented Agent Skills install

npx skills add https://github.com/cloudflare/skills

Thyme RAG Capsules

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