CI workflow (websockets/ws)
The CI workflow from websockets/ws, explained and optimized by Latchkey.
CI health: C - fair
Point runs-on at Latchkey and get run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.
What it does
This is the CI workflow from the websockets/ws repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.
Below, Latchkey shows a faster, safer version produced by its optimization engine.
The workflow
name: CI
on:
- push
- pull_request
permissions: {}
jobs:
test:
runs-on: ${{ matrix.os }}
strategy:
matrix:
arch:
- x64
node:
- 10
- 12
- 14
- 16
- 18
- 20
- 22
- 24
- 26
os:
- macOS-latest
- ubuntu-latest
- windows-latest
include:
- arch: x86
node: 10
os: windows-latest
- arch: x86
node: 12
os: windows-latest
- arch: x86
node: 14
os: windows-latest
- arch: x86
node: 16
os: windows-latest
- arch: x86
node: 20
os: windows-latest
- arch: x86
node: 22
os: windows-latest
steps:
- uses: actions/checkout@v7
- uses: actions/setup-node@v6
with:
node-version: ${{ matrix.node }}
architecture: ${{ matrix.arch }}
cache: npm
cache-dependency-path: ./package.json
- run: npm install
- run: npm run lint
if:
matrix.os == 'ubuntu-latest' && matrix.node == 24 && matrix.arch ==
'x64'
- run: npm test
- run: |
id=$(node -e "console.log(crypto.randomBytes(16).toString('hex'))")
echo "job_id=$id" >> $GITHUB_OUTPUT
id: get_job_id
shell: bash
- uses: coverallsapp/github-action@v2
with:
flag-name:
${{ steps.get_job_id.outputs.job_id }} (Node.js ${{ matrix.node }}
${{ matrix.arch }} on ${{ matrix.os }})
github-token: ${{ secrets.GITHUB_TOKEN }}
parallel: true
coverage:
needs: test
runs-on: ubuntu-latest
steps:
- uses: coverallsapp/github-action@v2
with:
github-token: ${{ secrets.GITHUB_TOKEN }}
parallel-finished: true
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: CI on: - push - pull_request permissions: {} concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: test: timeout-minutes: 30 runs-on: ${{ matrix.os }} strategy: matrix: arch: - x64 node: - 10 - 12 - 14 - 16 - 18 - 20 - 22 - 24 - 26 os: - macOS-latest - ubuntu-latest - windows-latest include: - arch: x86 node: 10 os: windows-latest - arch: x86 node: 12 os: windows-latest - arch: x86 node: 14 os: windows-latest - arch: x86 node: 16 os: windows-latest - arch: x86 node: 20 os: windows-latest - arch: x86 node: 22 os: windows-latest steps: - uses: actions/checkout@v7 - uses: actions/setup-node@v6 with: node-version: ${{ matrix.node }} architecture: ${{ matrix.arch }} cache: npm cache-dependency-path: ./package.json - run: npm install - run: npm run lint if: matrix.os == 'ubuntu-latest' && matrix.node == 24 && matrix.arch == 'x64' - run: npm test - run: | id=$(node -e "console.log(crypto.randomBytes(16).toString('hex'))") echo "job_id=$id" >> $GITHUB_OUTPUT id: get_job_id shell: bash - uses: coverallsapp/github-action@v2 with: flag-name: ${{ steps.get_job_id.outputs.job_id }} (Node.js ${{ matrix.node }} ${{ matrix.arch }} on ${{ matrix.os }}) github-token: ${{ secrets.GITHUB_TOKEN }} parallel: true coverage: timeout-minutes: 30 needs: test runs-on: latchkey-small steps: - uses: coverallsapp/github-action@v2 with: github-token: ${{ secrets.GITHUB_TOKEN }} parallel-finished: true
What changed
- Run on Latchkey managed runners with one line (
runs-on), which apply the fixes below automatically and self-heal transient failures. This example useslatchkey-small; pick the runner size that fits the job. - Cancel superseded runs when a branch or PR gets a newer push.
- Add a job timeout so a hung step cannot burn hours of runner time.
1 third-party action is referenced by a movable tag. Pin it to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.
What Latchkey heals here
This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:
- Dependency installs
This workflow runs 2 jobs (28 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.