Bencher

Bencher is a suite of continuous benchmarking tools. Have you ever had a performance regression impact your users? Bencher could have prevented that from happening. Bencher allows you to detect and prevent performance regressions before they hit production.

Run: Run your benchmarks locally or in CI using your favorite benchmarking tools. The bencher CLI simply wraps your existing benchmark harness and stores its results.
Track: Track the results of your benchmarks over time. Monitor, query, and graph the results using the Bencher web console based on the source branch, testbed, benchmark, and measure.
Catch: Catch performance regressions in CI. Bencher uses state of the art, customizable analytics to detect performance regressions before they make it to production.

For the same reasons that unit tests are run in CI to prevent feature regressions, benchmarks should be run in CI with Bencher to prevent performance regressions. Performance bugs are bugs!

Bencher consists of:

bencher CLI
Bencher API Server
Bencher Console Web UI

Though Bencher is open source, there is also a hosted version available Bencher Cloud.

The best place to start is the Bencher Quick Start tutorial.

🐰 Use the GitHub Action with your project

Documentation

Tutorial
- Quick Start
- Docker Quick Start
How To
Explanation
Reference

🌐 Also available in:

Supported Benchmark Harnesses

{...} JSON
#️⃣ C#
- BenchmarkDotNet
➕ C++
- Catch2
- Google Benchmark
🕳 Go
- go test -bench
☕️ Java
- Java Microbenchmark Harness (JMH)
🕸 JavaScript
- Benchmark.js
- console.time/console.timeEnd
🐍 Python
- airspeed velocity
- pytest-benchmark
♦️ Ruby
- Benchmark
🦀 Rust
❯_ Shell
- Hyperfine

👉 For more details see the explanation of benchmark harness adapters.

Showcase

Microsoft CCF

Rustls

Diesel

Hydra Database

GreptimeDB

Tailcall

Ratatui

Poolifier

Wire

👉 Checkout all public projects.

GitHub Actions

Install the Bencher CLI using the GitHub Action, and use it for continuous benchmarking in your project.

name: Continuous Benchmarking with Bencher
on:
  push:
    branches: main
jobs:
  benchmark_with_bencher:
    name: Benchmark with Bencher
    runs-on: ubuntu-latest
    env:
      BENCHER_PROJECT: my-project-slug
      BENCHER_API_TOKEN: ${{ secrets.BENCHER_API_TOKEN }}
    steps:
      - uses: actions/checkout@v4
      - uses: bencherdev/bencher@main
      - run: bencher run "bencher mock"

Supported Operating Systems:

Linux (x86_64 & ARM64)
MacOS (x86_64 & ARM64)
Windows (x86_64 & ARM64)

👉 For more details see the explanation of how to use GitHub Actions.

Repository Secrets

Add BENCHER_API_TOKEN to you Repository secrets (ex: Repo -> Settings -> Secrets and variables -> Actions -> New repository secret). You can find your API tokens by running bencher token list my-user-slug or view them in the Bencher Console.

Error on Alert

You can set the bencher run CLI subcommand to error if an Alert is generated with the --err flag.

bencher run --err "bencher mock"

👉 For more details see the explanation of bencher run.

Comment on PRs

You can set the bencher run CLI subcommand to comment on a PR with the --github-actions argument.

bencher run --github-actions "${{ secrets.GITHUB_TOKEN }}" "bencher mock"

👉 For more details see the explanation of bencher run.

Example PR Comment

Bencher Report

Branch	254/merge
Testbed	ubuntu-latest

🚨 1 ALERT: Threshold Boundary Limit exceeded!

Benchmark	Measure Units	View	Benchmark Result (Result Δ%)	Lower Boundary (Limit %)	Upper Boundary (Limit %)
Adapter::Json	Latency nanoseconds (ns)	📈 plot 🚨 alert 🚷 threshold	3,445.60 (+1.52%)		3,362.07 (102.48%)

Click to view all benchmark results

Benchmark	Latency	Benchmark Results nanoseconds (ns) (Result Δ%)	Upper Boundary nanoseconds (ns) (Limit %)
Adapter::Json	📈 view plot 🚨 view alert 🚷 view threshold	3,445.60 (+1.52%)	3,362.07 (102.48%)
Adapter::Magic (JSON)	📈 view plot 🚷 view threshold	3,431.40 (+0.69%)	3,596.95 (95.40%)
Adapter::Magic (Rust)	📈 view plot 🚷 view threshold	22,095.00 (-0.83%)	24,732.80 (89.33%)
Adapter::Rust	📈 view plot 🚷 view threshold	2,305.70 (-2.76%)	2,500.49 (92.21%)
Adapter::RustBench	📈 view plot 🚷 view threshold	2,299.90 (-3.11%)	2,503.41 (91.87%)

🐰 View full continuous benchmarking report in Bencher

Specify CLI Version

There is also an optional version argument to specify an exact version of the Bencher CLI to use. Otherwise, it will default to using the latest CLI version.

- uses: bencherdev/bencher@main
  with:
    version: 0.4.20

Specify an exact version if using Bencher Self-Hosted. Do not specify an exact version if using Bencher Cloud as there are still occasional breaking changes.

Share Your Benchmarks

All public projects have their own perf page. These results can easily be shared with an auto-updating perf image. Perfect for your README!

Contributing

The easiest way to contribute is to open this repo as a Dev Container in VSCode by simply clicking one of the buttons below. Everything you need will already be there! Once set up, both the UI and API should be built, running, and seeded at localhost:3000 and localhost:61016 respectively. To make any changes to the UI or API though, you will have to exit the startup process and restart the UI and API yourself.

🐰 All pull requests should target the `devel` branch

There is also a pre-built image from CI available for each branch: ghcr.io/bencherdev/bencher-dev-container

License

All content that resides under any directory or feature named "plus" is licensed under the Bencher Plus License.

All other content is licensed under the Apache License, Version 2.0 or MIT License at your discretion.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Bencher by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.

bencherdev/bencher