depmedic / benchmarks / prettier/prettier

prettier/prettier - GitHub Actions cost & CI smells

From the depmedic OSS benchmark dataset. Source: public workflow YAML in prettier/prettier/.github/workflows.

Workflows

Per-run $ (modeled)

$1.02

Monthly $ @ 30/day

$921.6

ci-doctor findings

Numbers are modeled: 8 minutes per priced job, 30 runs per day per workflow, 30-day month, GitHub-hosted runner rate sheet. prettier/prettier's real run frequency is unknown to me. Smells, however, are real - they come from parsing the actual YAML.

Findings by rule

Rule	Hits
`missing-timeout`	16
`deprecated-action`	6
`matrix-overcommit`	3
`missing-cache`	3
`always-run-on-pr`	2
`artifact-no-retention`	1
`stale-cache-key`	1

Per-workflow breakdown

Workflow	Jobs	Per-run $	Findings
`prod-test.yml`	6	$0.19	14
`_build.yml`	1	$0.06	2
`bundler-friendly.yml`	2	$0.06	2
`check-sizes.yml`	1	$0.06	1
`cleanup-cspell.yml`	1	$0.06	1
`codeql.yml`	1	$0.06	3
`eslint-rules.yml`	1	$0.06	1
`lint.yml`	1	$0.06	1
`lock.yml`	1	$0.06	1
`mark-issue-duplicate.yml`	1	$0.06	1
`no-response.yml`	1	$0.06	1
`prevent-file-change.yml`	1	$0.06	1
`release-script-test.yml`	1	$0.06	1
`support.yml`	1	$0.06	1
`autofix.yml`	1	$0.00	0
`dev-package-test.yml`	1	$0.00	0
`dev-test.yml`	1	$0.00	1

Examples of what ci-doctor reports

prod-test.yml · WARN missing-cache
actions/setup-node has no cache option. Add 'with: cache: <ecosystem>' to skip dep re-downloads. Saves 30-90 seconds per run.

_build.yml · WARN missing-timeout
Job 'build' has no timeout-minutes. Default is 360 (6h). A hung job can drain your CI budget.

_build.yml · INFO artifact-no-retention
upload-artifact has no retention-days. CI artifacts pile up at the repo default (usually 90d). Set 7-14d unless you need long-term retention.

bundler-friendly.yml · WARN missing-timeout
Job 'webpack' has no timeout-minutes. Default is 360 (6h). A hung job can drain your CI budget.

What you can do

If you maintain prettier/prettier or a similar workflow shape, three patterns probably move the most dollars per minute of work:

Add a concurrency: block with cancel-in-progress: true on every PR-triggered workflow.
Set timeout-minutes on every job (default is 6 hours).
Make sure every setup-* action sets cache: <ecosystem>.

Free CLIs that automate the audit and the pin step:

npx ci-doctor             # 14-rule audit
npx ci-doctor --fix       # auto-apply the four safe fixes
npx pin-actions           # pin every uses: ref to a SHA
npx gha-budget            # estimate per-run $ + monthly

About this dataset