Where the minutes go (30d)
Waste detected
Biggest wins first, each with the exact config fix.
Missing dependency cache · CICD
Add `Swatinem/rust-cache@v2` (the de-facto cargo cache), or an `actions/cache@v4` step keyed on `Cargo.lock`.
- uses: Swatinem/rust-cache@v2No concurrency control · CICD
Add a `concurrency:` block keyed on branch to cancel superseded runs when devs push twice quickly.
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
cancel-in-progress: trueAlso found: 6 more config fixes with negligible recoverable minutes: timeouts, retention, path filters
No job timeout · CICD
No job sets `timeout-minutes`, so a hung step can run to GitHub's 6-hour default. Add `timeout-minutes` to each job.
jobs:
build:
runs-on: ubuntu-latest
timeout-minutes: 15Artifacts at default retention · CICD
`upload-artifact` has no `retention-days`, so artifacts keep up to 90 days (storage cost). Set e.g. `retention-days: 7`.
- uses: actions/upload-artifact@v4
with:
name: build
path: dist/
retention-days: 7No path filters on triggers · CICD
Runs on every push/PR with no `paths:` filter, so docs-only changes still trigger full CI. Add a `paths:` filter if that's common.
on:
pull_request:
paths:
- 'src/**'
- 'package.json'Large build matrix · CICD
The matrix expands to many parallel jobs per run, multiplying billable minutes, often more combos than you need. Trim the axes, or use `include:` to list only the combinations that matter.
strategy:
fail-fast: true
matrix:
include:
- { os: ubuntu-latest, node: 20 }
- { os: ubuntu-latest, node: 22 }Premium runners (macOS / Windows) · CICD
macOS bills ~10x and Windows ~2x a Linux minute. The cost estimate above assumes Linux, so your real spend is higher. Move any job that doesn't need them to `ubuntu-latest`.
jobs:
build:
runs-on: ubuntu-latest # ~10x cheaper than macos-latestThird-party actions pinned to a mutable ref · CICD
4 third-party actions pinned to a branch or other mutable ref, which can change under you (supply-chain risk, non-reproducible builds). Pin to a full commit SHA instead.
uses: dtolnay/rust-toolchain@<full-sha> # was @stableCopy every fix as one block (8 snippets, annotated per workflow)
# Missing dependency cache (cargo) (applies to: CICD)
- uses: Swatinem/rust-cache@v2
# No concurrency control (applies to: CICD)
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
cancel-in-progress: true
# No job timeout (applies to: CICD)
jobs:
build:
runs-on: ubuntu-latest
timeout-minutes: 15
# Artifacts at default retention (applies to: CICD)
- uses: actions/upload-artifact@v4
with:
name: build
path: dist/
retention-days: 7
# No path filters on triggers (applies to: CICD)
on:
pull_request:
paths:
- 'src/**'
- 'package.json'
# Large build matrix (applies to: CICD)
strategy:
fail-fast: true
matrix:
include:
- { os: ubuntu-latest, node: 20 }
- { os: ubuntu-latest, node: 22 }
# Premium runners (macOS / Windows) (applies to: CICD)
jobs:
build:
runs-on: ubuntu-latest # ~10x cheaper than macos-latest
# Third-party actions pinned to a mutable ref (applies to: CICD)
uses: dtolnay/rust-toolchain@<full-sha> # was @stableEach snippet is representative. Merge into the named workflow files rather than pasting wholesale.
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