Tests-linux workflow (arl/statsviz)

The Tests-linux workflow from arl/statsviz, explained and optimized by Latchkey.

What it does

This is the Tests-linux workflow from the arl/statsviz 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

on: [push, pull_request]
name: Tests-linux
jobs:
  tests-linux:
    strategy:
      matrix:
        go-version: [1.25.x, 1.26.x]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go-version }}
      - name: go mod tidy check
        run: go mod tidy -diff
      - name: Tests
        run: go test -race -shuffle=on ./...

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

on: [push, pull_request]
name: Tests-linux
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  tests-linux:
    timeout-minutes: 30
    strategy:
      matrix:
        go-version: [1.25.x, 1.26.x]
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go-version }}
      - name: go mod tidy check
        run: go mod tidy -diff
      - name: Tests
        run: go test -race -shuffle=on ./...
 

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 uses latchkey-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• Cancel superseded runs when a branch or PR gets a newer push.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.

This workflow runs 1 job (2 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow