Test workflow (cespare/reflex)

The Test workflow from cespare/reflex, explained and optimized by Latchkey.

What it does

This is the Test workflow from the cespare/reflex 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: Test

on:
  push:
    branches: ["main"]
  pull_request:

jobs:
  test:
    strategy:
      matrix:
        go: ["1.25", "1.26"]
        os: ["ubuntu-latest", "macos-latest"]
    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go }}

      - run: "go test -count 1 -bench . -benchtime 1x ./..."

The same workflow, on Latchkey

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

name: Test
 
on:
  push:
    branches: ["main"]
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    timeout-minutes: 30
    strategy:
      matrix:
        go: ["1.25", "1.26"]
        os: ["ubuntu-latest", "macos-latest"]
    runs-on: ${{ matrix.os }}
 
    steps:
      - uses: actions/checkout@v6
 
      - uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go }}
 
      - run: "go test -count 1 -bench . -benchtime 1x ./..."
 

What changed

• Cancel superseded runs when a branch or PR gets a newer push.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 (4 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