data-oriented-perf SKILL.md skillA
data-oriented-perf from jpcaparas/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jpcaparas/skills/data-oriented-perf@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
- jpcaparas/skills
- Path
skills/engineering/data-oriented-perf/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Nov 3, 2026
- Size
- 10,430 bytes
- Repository stars
- 56
- License
- none declared
Passive data-oriented perf design after Jarred Sumner (Bun): flat arrays, indices, packed bits, SoA, redesign over caches. Use on hot paths; measure, keep semantics.
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
# data-oriented-perf Make slow code fast by changing how its data is laid out, addressed, and traversed, instead of layering caches on top of a slow design. The skill is built around four prompts that Jarred Sumner, creator of the Bun JavaScript runtime, says he often gives Claude during performance work. Each one pushes toward data-oriented design: think about the data the hot path touches and the order it touches it, not about objects. ## Passive Trigger Load this skill in the background, even without explicit invocation, whenever the task is performance optimization or the design or redesign of a hot path. Examples include acting on a profile, reducing latency, throughput loss, memory footprint, allocations, or cache misses, and rewriting inner loops, parsers, lexers, allocators, schedulers, interpreters, serializers, renderers, simulations, indexes, or query engines. …
Read the whole file at its exact version.
How to install
mdr add jpcaparas/skills/data-oriented-perf@sha256:10c6e9657fb32390The 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_pzaye3g37xq44xek)
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Versions
The registry has recorded 1 version of this file, committed on Nov 3, 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 (10430 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
jpcaparas/skills · 56 stars · license none declared · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pzaye3g37xq44xek GET https://markdownregistry.com/api/v1/resolve?ref=jpcaparas/skills/data-oriented-perf GET https://markdownregistry.com/api/v1/blob/10c6e9657fb323900c6d03deb382a3cb1c49a7fbd19715167f7e9fd7d9112393
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.