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Python Package Manager Shootout

Benchmarking the performance of different Python package managers via GitHub Actions.

The list of packages comes from Sentry's requirements.txt file which was chosen arbitrarily as a non-trivial real-world example.

Package Managers

Additional package managers are welcome (see Contributing below). At a minimum, they should be able to generate a lock file for the dependency set and download/install the dependencies locally.

For more background, see https://lincolnloop.com/blog/python-package-manager-shootout/.

Operations

The following operations are measured in the benchmark:

  • tooling - Installing the package manager using its recommended method.
  • import - Importing/converting the requirements.txt to the native format for the package manager. Note: this benchmark is problematic because some tools also install the packages in this step.
  • lock - Generating a lockfile for the packages.
  • install-cold - Installing the packages with an empty cache.
  • install-warm - Installing the packages with a pre-populated cache.
  • update - Update the lock file and install updated packages.
  • add-package - Installing a new package and updating the lock file.

Results

Results can be seen at https://lincolnloop.github.io/python-package-manager-shootout/ and in the summary for each individual GitHub Action run. An artifact named stats is created which contains the results in CSV and SQLite format.

Contributing

The Makefile defines all the operations used in the benchmark. Any package-manager specific code should be modified there. The workflow (.github/workflows/benchmark.yml) is generated programmatically and is the same for each package manager.

To add a new package manager:

  1. Copy the block in the Makefile for one of the existing package managers and modify it to use the commands provided by the new package manager.
  2. Add a directory with the same name as the package manager. Add any required files (e.g. pyproject.toml) to the directory without the dependencies. If no files are required, add an empty .gitignore to the directory.
  3. Run make github-workflow to regenerate the workflow file.

Website

The website is a static site deployed to GitHub Pages. As part of the deployment it downloads stats from the previous four benchmarks (run every 6 hours in GitHub Actions), calculates the average, and rebuilds the website. The code for this is in site and .github/workflows/deploy.yml. The site will automatically rebuild after the benchmarks run, but it can also be triggered by pushing to the deploy/site branch.

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