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Codspeed

CodSpeed is the all-in-one performance testing toolkit. Dive into benchmarking results, flamegraphs, and performance comparisons — give Claude granular profiling context to pinpoint bottlenecks and autonomously iterate on performance via the CodSpeed MCP server.

PluginDevelopmentSource ↗Claude marketplace ↗

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★ 374
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Install

Tested ✓✓ Verified from docsOfficial docs ↗
/plugin install codspeed@claude-plugins-official

Tested ✓ on 2026-10-16: installed and loaded in a throwaway sandbox with no credentials.

Log excerpt
Installing plugin "codspeed@claude-plugins-official"...✔ Successfully installed plugin: codspeed@claude-plugins-official (scope: user)
$ verify:
  ❯ codspeed@claude-plugins-official
    Status: ✔ enabled
1 run, latest 2026-10-16

README

View on GitHub ↗

<p align="center"> <a href="https://codspeed.io/?utm_source=codspeed&utm_medium=readme"> <picture> <source media="(prefers-color-scheme: dark)" srcset="https://codspeed.io/codspeed-logo-dark.svg"> <source media="(prefers-color-scheme: light)" srcset="https://codspeed.io/codspeed-logo-light.svg"> <img alt="CodSpeed logo" src="https://codspeed.io/codspeed-logo-light.svg" width="400px"> </picture> </a> </p>

<h3 align="center">Optimize code performance and catch regressions early.</h3>

<p align="center"><a href="https://codspeed.io/login?flow=get-started&utm_source=github-readme">Get Started</a> · <a href="https://codspeed.io/docs?utm_source=github-readme">Documentation</a></p>

<br/>

<p align="center"> <a href="https://github.com/CodSpeedHQ/codspeed/releases/latest"><img src="https://img.shields.io/github/v/release/CodSpeedHQ/codspeed" alt="Latest Release"></a> <a href="https://github.com/CodSpeedHQ/codspeed/releases"><img src="https://img.shields.io/github/downloads/CodSpeedHQ/codspeed/total?logo=github" alt="Downloads"></a> <a href="https://github.com/CodSpeedHQ/codspeed/actions/workflows/ci.yml"><img src="https://img.shields.io/github/actions/workflow/status/CodSpeedHQ/codspeed/ci.yml?branch=main&logo=github&label=CI" alt="CI Status"></a> <a href="https://github.com/CodSpeedHQ/codspeed/blob/main/LICENSE-APACHE"><img src="https://img.shields.io/github/license/CodSpeedHQ/codspeed" alt="License"></a> <a href="https://codspeed.io/discord"><img src="https://img.shields.io/badge/chat on-discord-7289da.svg" alt="Discord Chat"></a> <a href="https://codspeed.io/?utm_source=badge"><img src="https://img.shields.io/endpoint?url=https://codspeed.io/badge.json" alt="CodSpeed Badge"></a> </p>

Key features

  • 🎯 <1% variance in measurements using CPU simulation - no more flaky benchmarks.
  • 🔥 Differential flamegraphs to pinpoint exactly what got slower, commit by commit.
  • 💬 PR comments & status checks showing performance impact directly in your workflow.
  • 🛡️ Merge protection to block PRs that degrade performance beyond your threshold.
  • 🐍 Multi-language support for Python, Rust, Node.js, Go, C/C++ and more.
  • 🏠 Run locally or in CI - works on your machine and integrates with GitHub Actions, GitLab CI, CircleCI, and more.
  • 🔌 Plug your existing benchmarks in less than 5 minutes - works with pytest, vitest, criterion, and more.
Read the full README on GitHub →

Preview from the source repo. Images are removed.

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