performance-analyzer

performance-analyzer is an agent for Claude Code from lhfer/claude-howto-zh-cn. It costs 7 tokens per session (59 once invoked), scanned A, original, MIT.

An analysis agent that examines possible performance problems in software.

In plain words
What is it for?
It is intended for reviewing algorithm complexity, database query efficiency, memory use, and caching opportunities.
Why use it?
The description does not specify how it performs the analysis or what it can change.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the pr-review plugin — 3 commands, 3 agents shipped together

Good fit It is intended for reviewing algorithm complexity, database query efficiency, memory use, and caching opportunities.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/lhfer/claude-howto-zh-cn/performance-analyzer
About the project

Claude Code 中文全面上手指南 is a Chinese-language learning guide for using Claude Code and combining features such as commands, memory, skills, hooks, MCP, subagents, and plugins. It is aimed at Chinese beginners and provides learning paths, examples, and compatibility guidance, while the catalogue entries package parts of that guidance as agent resources.

lhfer/claude-howto-zh-cn · 2,293 stars · on GitHub

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.

Clone the repo
git clone --depth 1 https://github.com/lhfer/claude-howto-zh-cn

Made for: Claude Code.

Or install pr-review, the plugin that ships this one along with the rest of its 3 commands, 3 agents.

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 performance-analyzer

README.md
[![agentmods](https://agentmods.dev/badge/agents/lhfer/claude-howto-zh-cn/performance-analyzer/github.svg)](https://agentmods.dev/agents/lhfer/claude-howto-zh-cn/performance-analyzer)
Your own site
<a href="https://agentmods.dev/agents/lhfer/claude-howto-zh-cn/performance-analyzer"><img src="https://agentmods.dev/badge/agents/lhfer/claude-howto-zh-cn/performance-analyzer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for performance-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/agents/lhfer/claude-howto-zh-cn/performance-analyzer"><img src="https://agentmods.dev/badge/agents/lhfer/claude-howto-zh-cn/performance-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 59 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00007 $0.00059
Opus 5 $0.00003 $0.00030
Sonnet 5 $0.00001 $0.00012
Haiku 4.5 $0.00001 $0.00006

Measured 9d ago against content hash a44586df49e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

performance-analyzer 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 9d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

07-plugins/pr-review/agents/performance-analyzer.md · 15 lines

What it actually says

Performance Analyzer / 性能分析代理

负责:

  • 算法复杂度
  • 数据库查询效率
  • 内存使用
  • 缓存机会
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. 9d ago First seen · 15 lines · 7 tokens per session scan A a44586df49e6

Subscribe to this mod's changes

performance-analyzer is an agent published in the GitHub repository lhfer/claude-howto-zh-cn (2,293 stars, last pushed 1mo ago), licensed MIT. It adds 7 tokens to every session and 59 once invoked, about $0.0000 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.