Running Performance Tests

What it does

When your agent uses it

• Performing specialized testing
• With phrases like run load tests
• Test performance
• Benchmark the system

Example prompts

• “run load tests”
• “test performance”
• “benchmark the system”
• “/running-performance-tests”

Requirements

• Python 3
• Node.js
• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Edit, Grep, Glob, Bash(test:perf-*)

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

1. 1Define performance test scenarios based on production traffic patterns
2. 2Create test scripts targeting critical endpoints
3. 3Configure load profiles
4. 4Execute the performance test
5. 5Analyze results against SLA thresholds
6. 6Identify and document bottlenecks
7. 7Generate a performance report with visualizations and recommendations.

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Grep
  • Glob
  • Bash(test:perf-*)

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 4 files in scripts/ (Python and JavaScript), which the agent can run.

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • api.test.com

  Also links to:

  • grafana.com
  • artillery.io
  • docs.locust.io
  • jmeter.apache.org
  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Running Performance Tests loads about 1.5k tokens when it runs, and up to ~1.5k if it reads all its reference files. Until then it costs about 56 tokens; SKILL.md has 540 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~56

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 540 words, ~1,530 tokens.

name

running-performance-tests

description

Execute load testing, stress testing, and performance benchmarking. Use when performing specialized testing. Trigger with phrases like "run load tests", "test performance", or "benchmark the system".

allowed-tools

Read, Write, Edit, Grep, Glob, Bash(test:perf-*)

compatibility

Designed for Claude Code

version

1.30.0

author

Jeremy Longshore <jeremy@intentsolutions.io>

license

MIT

tags

testing, performance, performance-tests

import http from 'k6/http';
import { check, sleep } from 'k6';

export const options = {
  stages: [
    { duration: '2m', target: 50 },   // Ramp up
    { duration: '5m', target: 50 },   // Sustained load
    { duration: '2m', target: 200 },  // Stress  # HTTP 200 OK
    { duration: '1m', target: 0 },    // Ramp down
  ],
  thresholds: {
    http_req_duration: ['p(95)<200', 'p(99)<500'],  # 500: HTTP 200 OK
    http_req_failed: ['rate<0.01'],
  },
};

export default function () {
  const res = http.get('https://api.test.com/products');
  check(res, {
    'status is 200': (r) => r.status === 200,  # HTTP 200 OK
    'response time OK': (r) => r.timings.duration < 300,  # 300: timeout: 5 minutes
  });
  sleep(1); // Think time
}

config:
  target: "https://api.test.com"
  phases:
    - duration: 120
      arrivalRate: 10
      name: "Warm up"
    - duration: 300  # 300: timeout: 5 minutes
      arrivalRate: 50
      name: "Sustained load"
  ensure:
    p95: 200  # HTTP 200 OK
    maxErrorRate: 1
scenarios:
  - flow:
      - get:
          url: "/api/products"
      - think: 1
      - post:
          url: "/api/cart"
          json: { productId: "{{ $randomString() }}" }

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 9 other files (scripts, references, assets) in skills/.curated/running-performance-tests of jeremylongshore/tons-of-skills-marketplace.

• SKILL.md
• assets/README.md
• assets/example_test_configurations.json
• assets/report_template.html
• assets/test_template.js
• references/README.md
• scripts/README.md
• scripts/analyze_results.py
• scripts/init_test.py
• scripts/run_test.py

Open the folder on GitHubat commit cfae287