pyperformance-result-compare

pyperformance-result-compare is a skill for Claude Code, Codex from sisibeloved/cpython-optimize-skill. It costs 42 tokens per session (618 once invoked), scanned A, original, MIT.

A comparison guide for existing pyperformance result files. It checks whether baseline and candidate runs were made under comparable conditions before interpreting speed changes.

In plain words
What is it for?
Use it to compare baseline and candidate JSON files, assess regressions or gains, judge result reliability, and identify benchmarks that need further investigation.
Why use it?
It helps distinguish a real optimization from differences in source code, CPU selection, environment, runtime setup, or normal measurement noise.

Skill for Claude CodeCodex

Part of the cpython-optimize-skill plugin — 35 skills, 9 agents, 2 hooks, 1 MCP server 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/sisibeloved/cpython-optimize-skill/pyperformance-result-compare
Any agent
npx skills add sisibeloved/cpython-optimize-skill --skill pyperformance-result-compare
Clone the repo
git clone --depth 1 https://github.com/sisibeloved/cpython-optimize-skill

Made for: Claude Code, Codex.

Or install cpython-optimize-skill, the plugin that ships this one along with the rest of its 35 skills, 9 agents, 2 hooks, 1 MCP server.

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 pyperformance-result-compare

README.md
[![agentmods](https://agentmods.dev/badge/skills/sisibeloved/cpython-optimize-skill/pyperformance-result-compare.svg)](https://agentmods.dev/skills/sisibeloved/cpython-optimize-skill/pyperformance-result-compare)
Your own site
<a href="https://agentmods.dev/skills/sisibeloved/cpython-optimize-skill/pyperformance-result-compare"><img src="https://agentmods.dev/badge/skills/sisibeloved/cpython-optimize-skill/pyperformance-result-compare.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 618 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 $0.00042 $0.00618
Opus 5 $0.00021 $0.00309
Sonnet 5 $0.00008 $0.00124
Haiku 4.5 $0.00004 $0.00062

Measured 3d ago against content hash 7e5167eedc76, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

pyperformance-result-compare 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 3d 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.

plugins/cpython-optimize-skill/skills/pyperformance-result-compare/SKILL.md · 39 lines

What it actually says

pyperformance Result Compare

负责解释结果,不负责跑 benchmark。

输入

  • baseline run.json
  • candidate run.json
  • speedup.json
  • 提交 baseline / candidate commit
  • 口径 baseline:CPython JIT、CinderX JIT、解释执行等

判断

  • 命令口径是否一致
  • ../using-cpython-optimize/references/baseline-source-contract.md 核对 baseline source 是否 baseline_source_verified,包括口径 baseline、提交 baseline、source path、commit/ref、dirty 状态、patchlevel.hSOABI 和容器 bind mount。
  • ../using-cpython-optimize/references/pyperformance-affinity-guidance.md 核对 baseline/candidate 的原始/实际 --affinity、可用 CPU 映射和并行/串行口径是否一致。
  • 先按 ../using-cpython-optimize/references/pyperformance-env-contract.md 核对 baseline/candidate 的 --inherit-environ、driver/worker env 和唯一差异轴。
  • CinderX JIT 口径必须核对 worker 内证据:.pthpyvenv.cfg / include-system-site-packagesimport cinderx / _cinderxcinderx.__file__cinderx.get_import_error()cinderx.is_initialized()
  • baseline/candidate 是否只在目标变量上不同
  • 方差、噪声和异常值
  • 收益范围、无收益范围、未验证范围
  • 需要回到 pyperformance-worker-run 的异常用例
  • 如果 baseline source、affinity 口径、环境契约、worker JIT 证据缺失或 baseline/candidate 不一致,先降级结论,不把 run.json 写成可信性能收益。

反问 Gate

  • baseline/candidate run.jsonspeedup.json 或口径 baseline 缺失且无法从路径/文件推断时,询问用户。
  • baseline source 缺少 commit/ref、dirty 状态、source path 或用户指定事实源时,询问用户补充 baseline 事实源。
  • 方差或异常值使结论不稳定,需要补跑、扩大样本或降级结论时,询问。
  • 用户要求收益外推到全量,但当前只覆盖单 benchmark 或小集合时,询问是否晋级验证。

输出可信收益、可信回归、baseline source 状态、噪声项、补测建议和不能外推的范围。

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. 3d ago First seen · 39 lines · 42 tokens per session scan A 7e5167eedc76

Subscribe to this mod's changes

pyperformance-result-compare is a skill published in the GitHub repository sisibeloved/cpython-optimize-skill (2 stars, last pushed 5d ago), licensed MIT. It adds 42 tokens to every session and 618 once invoked, about $0.0002 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 2026-08-31.

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