perf

77 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.

By hashgraph-online/awesome-codex-plugins (GitHub) · coding · 1,573 stars · scanned at commit 70b6a3a

Make a studio's game faster with a measured loop in real GPU Chrome on a computer and an emulated phone. Measure frame times, startup, downloads, memory and netplay for both server-room replicas or a browser-host pair. Profile hot functions, try one small change, compare alternating runs, and keep it only when the improvement exceeds noise, guarded measures hold and the two-browser check passes. Write the report in perf/. Use for stutter, lag, slow loading, phone drain, rendering costs or an ov…

Works with any agent that supports SKILL.md skills.

What this skill can do

Downloads and installs other software

The author does not mention this.

Found in 2 places.

plugins/homie-rocks/homie/skills/perf/SKILL.md, line 25`npm run dev` (another port: `npx --no-install homie-studio dev --port <n>`). Never `npm run build` by hand while a
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 106if (older) throw new Error(`this studio's @homie-rocks/studio is ${v.json?.version ?? 'unknown'}; perf needs ${NEEDS.join('.')} or later (homie-studio perf). Pi

Runs commands on your computer

The author does not mention this. It runs automatically when the plugin is installed. Expected for a coding skill.

Found in 11 places.

plugins/homie-rocks/homie/skills/perf/SKILL.md, line 36node <perf.mjs> baseline <game> --url http://127.0.0.1:8787 [--goal phone.replica.frame.p95] [--runs 6] [--seconds 15]
plugins/homie-rocks/homie/skills/perf/SKILL.md, line 67node <perf.mjs> try <game> --name "<the one change, in a line>" --looks same --plays same
plugins/homie-rocks/homie/skills/perf/SKILL.md, line 116node <perf.mjs> report <game>

Show 8 more

plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 39import { spawn, spawnSync } from 'node:child_process';
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 201const r = spawnSync('git', ['diff', '--no-index', '--no-color', '--src-prefix=a/', '--dst-prefix=b/', join('sources', a), join('sources', b)], { cwd: dir, encod
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 203if (r.error || (r.status !== 0 && r.status !== 1)) text = spawnSync('diff', ['-ru', join('sources', a), join('sources', b)], { cwd: dir, encoding: 'utf8', maxBu
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 330if (spawnSync('ffmpeg', ['-version'], { encoding: 'utf8', timeout: 15_000, killSignal: 'SIGKILL' }).status !== 0) return { note: 'ffmpeg is not installed: the p
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 736const ff = spawnSync('ffmpeg', ['-hide_banner', '-loglevel', 'error', '-y', '-i', src, '-q:v', '4', jpg], { timeout: CHILD_TIMEOUT_MS, killSignal: 'SIGKILL' });
plugins/homie-rocks/homie/hooks/codex.json, line 8{ "type": "command", "command": "node \"${PLUGIN_ROOT}/hooks/codex.mjs\" pre", "timeout": 90, "statusMessage": "Homie: checking this call" }
plugins/homie-rocks/homie/hooks/codex.json, line 15{ "type": "command", "command": "node \"${PLUGIN_ROOT}/hooks/codex.mjs\" prompt", "timeout": 10 }
plugins/homie-rocks/homie/hooks/codex.json, line 22{ "type": "command", "command": "node \"${PLUGIN_ROOT}/hooks/codex.mjs\" post", "timeout": 30 }

Connects to the internet

This is disclosed by the author in the skill's SKILL.md or README.

Found in 2 places.

plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 239const body = await fetch(`${url}/${game}/__game/`, { signal: AbortSignal.timeout(15_000) }).then((r) => r.text());
plugins/homie-rocks/homie/skills/perf/scripts/perf.mjs, line 244const buf = Buffer.from(await fetch(`${url}/${game}/__game/${f.split('/').map(encodeURIComponent).join('/')}`, { signal: AbortSignal.timeout(30_000) }).then((r)

Safer alternatives

Low-risk skills in the same category (coding) that look related. Check that one does what you need.

Other copies in this repository

hashgraph-online/awesome-codex-plugins has 1 more folder with a skill named perf. This page shows the lowest-scoring copy.

plugins/epicsagas/epic-harness/skills/perf 95/100 · Low risk

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'perf' ] || [ -L ~/.agents/skills/'perf' ]; then echo 'A skill folder named perf already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/hashgraph-online/awesome-codex-plugins' "$d" && git -C "$d" checkout --quiet '70b6a3a3a7c774671e45af646306e1448baf0511' -- 'plugins/homie-rocks/homie/skills/perf' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/homie-rocks/homie/skills/perf' ~/.agents/skills/'perf' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'perf' ~/.claude/skills/'perf' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-14	`70b6a3a`	77
2026-11-13	`3e1e6b2`	77
2026-11-12	`6d2e63f`	77
2026-11-11	`4070676`	77
2026-11-10	`f620aba`	77
2026-11-09	`3062ea3`	77
2026-11-08	`057d789`	77
2026-11-06	`e012fe1`	77