Perf Tools MCP Server

mcp-perf-tools

Performance analysis tools for AI agents, exposed via the Model Context Protocol (MCP).

Tools

benchmark

Benchmark JavaScript code execution. Run a snippet N times and measure min/max/avg/median/p95/p99 latency and operations per second. Optionally compare two implementations side by side.

Parameters:

• code (string) — JavaScript code to benchmark
• iterations (number, default 1000) — Number of iterations
• compareCode (string, optional) — Second implementation to compare
• labelA / labelB (string) — Labels for comparison output

memory_analyze

Analyze Node.js memory usage: heap used/total, RSS, external memory, and array buffers. Takes snapshots over time and uses linear regression to detect trends and potential memory leaks.

Parameters:

• action — "snapshot" | "analyze" | "clear"

big_o_estimate

Estimate Big O complexity from empirical timing data. Fits measurements against O(1), O(log n), O(n), O(n log n), O(n^2), O(n^3), and O(2^n) using R-squared scoring. Includes an ASCII growth curve visualization.

Parameters:

• inputSizes (number[]) — Array of input sizes
• executionTimesMs (number[]) — Corresponding execution times in ms

bundle_analyze

Analyze a JavaScript bundle file: raw size, gzip compressed estimate, detected module count, largest modules, and tree-shaking opportunities (side effects, duplicates).

Parameters:

• filePath (string) — Absolute path to the bundle file

load_test

Simple HTTP load tester. Sends N requests at a given concurrency level and reports response time percentiles, error rate, throughput (req/sec), and status code distribution.

Parameters:

• url (string) — Target URL
• totalRequests (number, default 100) — Total requests to send
• concurrency (number, default 10) — Concurrent request count
• method (string, default "GET") — HTTP method
• headers (object, optional) — HTTP headers
• body (string, optional) — Request body
• timeoutMs (number, default 30000) — Request timeout

Setup

npm install
npm run build

Usage with Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "perf-tools": {
      "command": "node",
      "args": ["D:/products/mcp-servers/mcp-perf-tools/dist/index.js"]
    }
  }
}

License

MIT