rayon-rs/rayonNew scan
75/ 100 · C

Popular and well-maintained. A little polish away from elite status.

Rayon: A data parallelism library for Rust

Rust13,067 starsApache-2.0updated 7d ago
DocumentationREADME, setup, examples, license
85
EngineeringTests, CI, linting, lockfiles
64
Project healthDescription, activity, stars, deps
88

What to fix first

The highest-impact improvements for this repo.

  1. 1
    CI/CD
    EngineeringInfo

    Add a lint step (e.g. `npm run lint`, `ruff check .`, `cargo clippy`) to catch style issues automatically.

  2. 2
    CI/CD
    EngineeringInfo

    Upload coverage to Codecov, Coveralls, or report it with `--coverage` flags.

  3. 3
    Install and run instructions
    DocumentationInfo

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

Detailed breakdown

Documentation

85
  • README100
    • README is present.
    • README is well structured with multiple sections.
    • README includes screenshots or visuals. Great for first impressions.
    • README has code examples.
    • README links to a live demo or deployed app.
    • README includes status badges.
  • Install and run instructions90
    • README documents how to install the project.
    • README documents how to run the project.
    • If your project uses environment variables, add a .env.example listing them (+10 pts).Add a .env.example listing all required environment variables so contributors know what to set up.
  • License100
    • Licensed under Apache-2.0.
  • Contributing guide25
    • Contributing guidance is in the README rather than a dedicated CONTRIBUTING.md (−20 pts vs dedicated file).Moving it to a CONTRIBUTING.md makes it easier to find and keeps the README focused. A dedicated file earns +45 pts base.
    • Optional: add a Code of Conduct (+5 pts).A CODE_OF_CONDUCT.md signals that your project is welcoming. GitHub has a template you can add in one click.

Engineering

64
  • Tests90
    • Test files detected (rayon-core/tests).
    • Cargo.toml has dev-dependencies and test files are present.
  • CI/CD85

    Not applicable?

    • CI is configured (.github/workflows/ci.yaml).
    • CI workflow runs tests.
    • CI runs on pull requests, not just on pushes to main.
    • CI does not appear to run a linter (−15 pts).Add a lint step (e.g. `npm run lint`, `ruff check .`, `cargo clippy`) to catch style issues automatically.
    • CI runs type checking (tsc, mypy, cargo check, etc.).
    • Optional: report test coverage in CI.Upload coverage to Codecov, Coveralls, or report it with `--coverage` flags.
    • CI tests across multiple environments or versions.
    • CI includes a build step.
  • Linting and formatting40
    • Rust projects have clippy available. Run `cargo clippy` for linting.
    • CI does not appear to run `cargo clippy` (−40 pts vs enforcing it in CI).Add `cargo clippy -- -D warnings` and `cargo fmt --check` as CI steps.
    • No rustfmt.toml found.Add a rustfmt.toml to enforce a consistent code style across contributors.
  • Reproducibility20
    • No Cargo.lock found (−70 pts). Rust binary/application crates should commit Cargo.lock.Run `cargo build` and commit the resulting Cargo.lock file.
    • No Dockerfile or runtime version pin found. Adding one earns +10 pts.Add a Dockerfile, .nvmrc, or .python-version to pin the runtime version and make the environment reproducible.
    • Dependabot covers 2 ecosystems (cargo, github-actions). Dependencies stay current.
    • Cargo.toml does not specify edition 2021.Add `edition = "2021"` to [package] in Cargo.toml for the latest Rust language features.
  • Issue and PR templates0
    • No issue or PR templates found (−90 pts).Add .github/ISSUE_TEMPLATE/ with bug_report.md and feature_request.md to guide contributors. It dramatically improves issue quality.
    • Optional: add a SECURITY.md.A SECURITY.md explains how to responsibly disclose vulnerabilities. Worth adding once the project has real users.

Project health

88
  • Dependency manifest75
    • Dependency manifest found (Cargo.toml).
    • Cargo.toml includes a description for crates.io.
    • Cargo.toml is missing a license field (−10 pts).Add `license = "MIT"` (or your preferred SPDX identifier) to [package].
    • Cargo.toml is missing a repository field (−10 pts).Add `repository = "https://github.com/owner/repo"` to [package].
  • Repository metadata85
    • Repository has a description.
    • Primary language detected: Rust.
  • Activity100
    • Actively maintained (pushed within the last month).
    • 13,067 stars.
  • Housekeeping100
    • .gitignore present.
Repository files13 root entries
  • .github
    Good: CI is configured (.github/workflows/ci.yaml).
    Good: Dependabot covers 2 ecosystems (cargo, github-actions). Dependencies stay current.
  • ci
  • rayon-core
    Good: Test files detected (rayon-core/tests).
  • rayon-demo
  • src
  • tests
  • .gitignore
    Good: .gitignore present.
  • Cargo.toml
    Good: Dependency manifest found (Cargo.toml).
  • FAQ.md
  • LICENSE-APACHE
  • LICENSE-MIT
  • 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.
  • RELEASES.md