Summary
Gives Claude five performance analysis tools for profiling code directly in conversation. The benchmark tool runs JavaScript snippets with statistical timing (p95, p99, ops/sec) and side-by-side comparisons. Memory analyze takes heap snapshots over time and uses linear regression to spot leaks. Big O estimate fits your timing data against common complexity classes and shows an ASCII growth curve. Bundle analyze inspects JavaScript bundles for size, compression, and tree-shaking opportunities. Load test hits HTTP endpoints with configurable concurrency and reports percentile latencies. Useful when you're optimizing hot paths, debugging memory issues, or need quick performance feedback without leaving the chat.
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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 benchmarkiterations(number, default 1000) — Number of iterationscompareCode(string, optional) — Second implementation to comparelabelA/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 sizesexecutionTimesMs(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 URLtotalRequests(number, default 100) — Total requests to sendconcurrency(number, default 10) — Concurrent request countmethod(string, default "GET") — HTTP methodheaders(object, optional) — HTTP headersbody(string, optional) — Request bodytimeoutMs(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
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Registryactive
Package@rog0x/mcp-perf-tools
TransportSTDIO
UpdatedMar 22, 2026
