Bencher - Continuous Benchmarking | WarmIndex

Bencher is an open-source continuous benchmarking platform that enables developers and teams to run, track, and catch performance regressions in their CI/CD pipelines.

🚀 Overview

Bencher is a comprehensive suite of continuous benchmarking tools, including a CLI, API server, and interactive web console. It integrates seamlessly into CI/CD workflows, allowing users to execute benchmarks using familiar harnesses, visualize metrics over time, and automatically detect regressions before they impact production. Think of it as CodeCov, but for performance instead of coverage.

This project solves the pervasive issue of performance regressions—silent killers that slow down apps without breaking tests. It's built for developers, engineering teams, and open-source maintainers who rely on CI/CD pipelines and want to monitor latency, throughput, build times, and more across languages like Rust, Go, Python, Java, and others.

The Bencher team created it to make performance a first-class citizen in development, treating perf bugs just like functional bugs. Inspired by personal experiences with regressions slipping into production, it standardizes continuous benchmarking to keep software fast.

✨ Key Features

Run benchmarks anywhere: Use the Bencher CLI to wrap existing benchmarking tools locally or in CI, supporting 10+ languages including Rust, Go, Python, C++, Java, and JavaScript.
Track performance over time: Interactive web console for monitoring, querying, graphing metrics by branch, testbed, benchmark—what matters and why it prevents surprises.
Catch regressions automatically: State-of-the-art analytics with customizable thresholds, upper bounds, PR comments, and CI job failures via GitHub Actions/GitLab integration.
Optional: Self-hosting, advanced reports, and growing language/ecosystem support.

🛠 Tech Stack

Frontend: Astro, TypeScript
Backend: Rust (API server & CLI)
Database: SQLite (1200x optimized performance)
Auth: Custom (API tokens)
Hosting: Self-hosted (Docker) or Bencher Cloud

👥 Who Is This For?

This project is useful for:

Developers who want to automatically track and alert on performance changes
Teams looking for easy CI/CD integration for perf testing
Indie makers and open-source projects building and maintaining high-performance software

📸 Screenshots / Demo

Live demo: https://bencher.dev/perf/bencher/reports/36a1eeff-57f5-4b99-b058-8c9c240a9f2c
GitHub: https://github.com/bencherdev/bencher

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Freemium / Open Source: Free tier ($0 per benchmark result) for public projects with community support. Paid Team ($0.01/result) and Enterprise ($0.05/result) for private projects, SSO, priority support. Self-hosted open core is free.

Is the source code available?

Yes — https://github.com/bencherdev/bencher

Can I contribute?

Yes—open issues on GitHub for bugs/feedback. For code, use the VSCode Dev Container, target PRs to devel branch. See DEVELOPMENT.md for local setup (runs console at localhost:3000).