pola-rs/polars
Grade a repo

94

/ 100

GradeA

A top-tier open source project. Docs, tests, and CI are all in excellent shape.

Top 5% of 5,156 graded repos

Extremely fast Query Engine for DataFrames, written in Rust

Documentation90
Engineering99
Health100
Rust38,875MIT1mo ago

Outstanding. A score of 96/100 puts this repo in a very small tier of truly well-engineered projects.

Top fixes

Highest-impact changes first, ranked by point weight

8 to address
  1. 1
    Install and run instructions9pt

    Add a .env.example listing all required environment variables so contributors know what to set up.

  2. 2
    Reproducibility6pt

    Add a Dockerfile, .nvmrc, or .python-version to pin the runtime version and make the environment reproducible.

  3. 3
    Contributing guide5pt

    Add setup instructions, code style notes, and how to run tests.

  4. 4
    Contributing guide5pt

    Show new contributors how to get a local dev environment running.

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Scorecard

Every check, grouped by category and sorted worst-first

Documentation

90

Contributing guide5pt52

CONTRIBUTING guide is very brief (−12 pts for depth). 150+ words earns +6 pts; 400+ earns +12 pts.

→ Add setup instructions, code style notes, and how to run tests.

Install and run instructions9pt90

README documents how to install the project.

README12pt100

README is present.

License6pt100

Licensed under MIT.

Engineering

99

Reproducibility6pt90

Lockfile present (Cargo.lock). Installs are reproducible.

Tests18pt100

Test files detected (.github/scripts/test_bytecode_parser.py).

CI/CD14pt100

CI is configured (.github/workflows/lint-global.yml).

Linting and formatting5pt100

Rust linting configured (rustfmt.toml, cargo clippy in CI, cargo fmt in CI).

Issue and PR templates6pt100

Issue or PR templates present.

Project health

100

Dependency manifest6pt100

Dependency manifest found (Cargo.toml).

Repository metadata5pt100

Repository has a description.

Activity5pt100

Actively maintained (pushed within the last month).

Housekeeping3pt100

.gitignore present.

Repository health signals

Activity, community, and responsiveness at scan time

Activity

  • 193 / 836
    Commits (30d / 90d)
  • 2,907
    Forks
  • 259
    Releaseslatest 3y ago

Community

  • 100% - Good
    Community health
  • 2 bus factor
    authors own >50% of commits
  • 38,875
    Watchers

Responsiveness

  • 3d
    Median issue response
  • <1h
    Median PR merge time
  • 2,784
    Open issues
Repository files25 root entries
  • .github
    Good: Code of conduct present.
    Good: Test files detected (.github/scripts/test_bytecode_parser.py).
    Good: CI is configured (.github/workflows/lint-global.yml).
    Good: Dependabot covers 4 ecosystems (github-actions, cargo, pip, pip). Dependencies stay current.
    Good: Issue or PR templates present.
  • crates
  • docs
  • examples
  • py-polars
  • pyo3-polars
  • tools
  • .gitattributes
  • .gitignore
    Good: .gitignore present.
  • .typos.toml
  • AI_POLICY.md
  • Cargo.lock
    Good: Lockfile present (Cargo.lock). Installs are reproducible.
  • Cargo.toml
    Good: Dependency manifest found (Cargo.toml).
  • CONTRIBUTING.md
    Issue: CONTRIBUTING guide is very brief (−12 pts for depth). 150+ words earns +6 pts; 400+ earns +12 pts.Fix: Add setup instructions, code style notes, and how to run tests.
    Issue: Contributing guide lacks a setup section (−12 pts).Fix: Show new contributors how to get a local dev environment running.
    Issue: Contributing guide lacks a code style section (−8 pts).Fix: Describe your linting/formatting rules and how to run them.
    Issue: Contributing guide lacks a testing section (−8 pts).Fix: Show contributors how to run the test suite (e.g. npm test, pytest, cargo test).
    Issue: Contributing guide lacks a PR workflow section (−8 pts).Fix: Explain how to fork, branch, and open a pull request so contributors know what to expect.
    Issue: Contributing guide has no code examples (−5 pts).Fix: Add code blocks showing example commands for setup, running tests, and submitting a PR.
  • deny.toml
  • dprint.json
  • flake.lock
  • flake.nix
  • LICENSE
    Good: Licensed under MIT.
  • Makefile
  • mkdocs.yml
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Good: README has code examples.
    Good: README links to a live demo or deployed app.
    Good: README includes status badges.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
  • rust-toolchain.toml
  • rustfmt.toml
    Good: Rust linting configured (rustfmt.toml, cargo clippy in CI, cargo fmt in CI).
  • SECURITY.md
    Good: Security policy present.
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