benchmarking SKILL.md skillA
benchmarking from illyism/dev-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add illyism/dev-skills/benchmarking@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- illyism/dev-skills
- Path
code/benchmarking/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 15, 2026
- Size
- 16,559 bytes
- Repository stars
- 6
- License
- none declared
Micro-benchmark and iteratively improve hot paths in any codebase — baseline first, mandatory improvement suggestions (bottleneck + 3 creative ideas + recommended next step), bounded attempts, user lock-in checkpoints, then human WHY comments after lock-in. Use when the user asks to benchmark, profile, optimize performance, compare implementations, or measure µs/op before shipping perf changes. Applies to Bun/Node, React, Next.js, browser code, and extensions.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Micro-benchmarking
Encode **process**, not target numbers. Numbers change; the workflow stays fixed.
## Harness setup
```
Measuring a live page / tab / paint (DOM, RSC, navigation)?
├── Yes → Available browser tools + CDP is enough. Do not copy a µs harness.
│ Round 0 = nodes, images, TTFB, nav ms, heap. Report ms, not µs/op.
└── No (pure function / mapper / transform)
├── Harness exists in repo? → use tools/benchmark-*.mjs or scripts/bench/*
└── No → copy from this skill's `scripts/` folder
benchmark-harness.mjs + benchmark-run-all.mjs
add package.json script: "benchmark": "bun tools/benchmark-run-all.mjs"
```
| Artifact | Typical location |
|---|---|
| Benchmark suites | `tools/benchmark-<domain>.mjs` or `scripts/bench/<domain>.mjs` |
| Shared harness | `benchmark-harness.mjs` (same dir as suites) |
| Domain catalog | `tools/benchmark-domains.md` (optional; use [domains-template.md](domains-template.md)) |
| Stack notes | [stacks.md](stacks.md) — React, Next.js, Node, DOM, IDB |
Benchmarks are **not** in CI. They are local decision tools before merging perf work.
---
## Step 0: Classify the work
```
…Read the whole file at its exact version.
How to install
mdr add illyism/dev-skills/benchmarking@sha256:9a00f6940797bfd0The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_j77tmi7anespheox)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 15, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16559 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
illyism/dev-skills · 6 stars · license none declared · pushed 2026-10-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_j77tmi7anespheox GET https://markdownregistry.com/api/v1/resolve?ref=illyism/dev-skills/benchmarking GET https://markdownregistry.com/api/v1/blob/9a00f6940797bfd0eea82e98d76bef63e8c7e2d7699f606ee8a4202075579f6e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from illyism/dev-skills
Every file in illyism/dev-skills