benchmark-runner

benchmark-runner is a skill for Claude Code, Codex from Mathews-Tom/armory. It costs 62 tokens per session (1,974 once invoked), scanned A, original, MIT.

A method for comparing algorithms, models, or implementations using defined workloads and measurements. It records metrics such as speed, throughput, memory use, or accuracy along with the hardware and software environment.

In plain words
What is it for?
Use it to design or run performance comparisons, latency tests, throughput tests, and speed evaluations. It helps choose representative test cases and produce reproducible benchmark reports.
Why use it?
It replaces vague claims such as “A is faster” with repeatable comparisons that show where each option performs better. It also accounts for test coverage, variation, warmups, and statistical confidence.

Skill for Claude CodeCodex

Part of the armory plugin — 57 skills, 1 agent shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/mathews-tom/armory/benchmark-runner
Any agent
npx skills add Mathews-Tom/armory --skill benchmark-runner
Clone the repo
git clone --depth 1 https://github.com/Mathews-Tom/armory

Made for: Claude Code, Codex.

Or install armory, the plugin that ships this one along with the rest of its 57 skills, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for benchmark-runner

README.md
[![agentmods](https://agentmods.dev/badge/skills/mathews-tom/armory/benchmark-runner.svg)](https://agentmods.dev/skills/mathews-tom/armory/benchmark-runner)
Your own site
<a href="https://agentmods.dev/skills/mathews-tom/armory/benchmark-runner"><img src="https://agentmods.dev/badge/skills/mathews-tom/armory/benchmark-runner.svg" alt="Measured on agentmods" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,974 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00062 $0.01974
Opus 5 $0.00031 $0.00987
Sonnet 5 $0.00012 $0.00395
Haiku 4.5 $0.00006 $0.00197

Measured 4d ago against content hash fcc00f47b1c8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

benchmark-runner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/benchmark-runner/SKILL.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Benchmark Runner

Standardizes performance comparison methodology: metric selection, test case design, environment capture, result formatting, and tradeoff analysis. Produces reproducible benchmark reports that support informed decisions — not just "A is faster than B" but "A is faster for small inputs while B scales better."

Reference Files

File Contents Load When
references/metric-selection.md Metric catalog (latency percentiles, throughput, memory, accuracy), selection criteria per task type Always
references/test-case-design.md Representative input selection, scale variation, edge case coverage, warmup strategies Always
references/environment-capture.md Hardware/software context recording, reproducibility requirements, variance control Always
references/statistical-rigor.md Sample sizing, variance measurement, significance testing, outlier handling Results need statistical validation

Prerequisites

  • Clear candidates to compare (at least 2)
  • Access to run or observe the candidates (code, API, or existing results)
  • Representative workload definition

Workflow

Phase 1: Define Scope

  1. What are the candidates? — Name each candidate precisely, including version. "Python dict vs Redis" is too vague. "Python 3.12 dict (in-process) vs Redis 7.2 (localhost, TCP)" is testable.
  2. What claims need validation? — "A is faster" → faster at what? For what input size? Under what load? Benchmark design flows from the specific claim.
  3. What is the decision context? — Why does this comparison matter? This determines which metrics are most important.

Read the full file on GitHub · 194 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 194 lines · 62 tokens per session scan A fcc00f47b1c8

Subscribe to this mod's changes

benchmark-runner is a skill published in the GitHub repository Mathews-Tom/armory (316 stars, last pushed 6d ago), licensed MIT. It adds 62 tokens to every session and 1,974 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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