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docs(hr-benchmarking): guide JavaScript performance hunts - #324
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Priority: ⬇️ Low Merge Risk: ⚪ Minimal · up to
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| Check name | Status | Explanation |
|---|---|---|
| Title check |  |
The title is concise, specific, and accurately describes the main documentation change: adding JavaScript performance-hunt guidance. |
| Description check | |
The description explains what changed and why, documents scope and admission considerations, lists validation results, and confirms the required checklist items. |
| Linked Issues check | |
Check skipped because no linked issues were found for this pull request. |
| Out of Scope Changes check | |
Check skipped because no linked issues were found for this pull request. |
| Suppressions Explained | |
The pull request changes only CHANGELOG.md and a Markdown reference. The added lines contain no lint, type-check, or formatter suppression directives or ignore-config entries, so no unexplained suppre… |
| Rule Changes Documented | |
PASS. The pull request changes only CHANGELOG.md and skills/hr-benchmarking/references/javascript.md. It does not change rules/core.md, a modifier file, or any skills/*/SKILL.md, and it does n… |
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Review comments at @skills/hr-benchmarking/references/javascript.md:
- Line 62: Update the weighted blocked-time guidance to distinguish milliseconds
blocked per second from a unitless duty-cycle fraction. Divide by 1,000 for a
fraction or by 10 for a percentage before calling it duty cycle; otherwise,
label the result as milliseconds blocked per second.
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CHANGELOG.mdskills/hr-benchmarking/references/javascript.md
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The JavaScript benchmarking reference explains how to measure a suspected bottleneck but gives little help choosing what to investigate or deciding whether synchronous work should become asynchronous.
Add a hunt checklist based on work counts, growth with input size, queueing, and resource lifetimes. Explain how to compare async I/O, chunked yielding, and reused workers using responsiveness, CPU, memory, and transfer costs. Include runtime checks for Cloudflare Workers, Bun, Electron, web, and React Native, with official Node and Cloudflare documentation links.
This stays in the existing benchmarking reference and adds no skill, dependency, or always-on rule. Apply the checklist during a performance investigation; it does not call for changing cold code or moving every synchronous call to a worker. The observed failure was treating component timings as whole-server evidence and carrying guessed worker thresholds into guidance. The new wording requires representative concurrency and distinguishes loop stalls from total work. Its effect on future agent behavior has not been evaluated.
Validation: Node tests (151 passed, 7 skipped); Bun tests (488 passed, 8 skipped); skill tests (338 passed); package verification with Bun; lint; formatting; and guidance-link checks all passed. Lint reports one warning in an unchanged test file. The added prose passes the writing check; the existing reference retains eight pre-existing writing cues.
CHANGELOG.mdentry underUnreleased.Summary by CodeRabbit