compressed-size workflow (developit/microbundle)

The compressed-size workflow from developit/microbundle, explained and optimized by Latchkey.

What it does

This is the compressed-size workflow from the developit/microbundle 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: compressed-size
on:
  pull_request:
    branches:
      - master

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: compressed-size-action
        uses: preactjs/compressed-size-action@v2
        with:
          pattern: 'dist/!(*.js.map)'
          build-script: build
          repo-token: '${{ secrets.GITHUB_TOKEN }}'

      - name: compressed-size-action
        uses: preactjs/compressed-size-action@v2
        with:
          pattern: 'test/fixtures/**/dist/!(*.map)'
          # We're using this to report size differences, not test, so update snapshots if they fail.
          # The CI can catch the test failures instead.
          build-script: 'test -- -u'
          repo-token: '${{ secrets.GITHUB_TOKEN }}'

The same workflow, on Latchkey

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

name: compressed-size
on:
  pull_request:
    branches:
      - master
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
 
      - name: compressed-size-action
        uses: preactjs/compressed-size-action@v2
        with:
          pattern: 'dist/!(*.js.map)'
          build-script: build
          repo-token: '${{ secrets.GITHUB_TOKEN }}'
 
      - name: compressed-size-action
        uses: preactjs/compressed-size-action@v2
        with:
          pattern: 'test/fixtures/**/dist/!(*.map)'
          # We're using this to report size differences, not test, so update snapshots if they fail.
          # The CI can catch the test failures instead.
          build-script: 'test -- -u'
          repo-token: '${{ secrets.GITHUB_TOKEN }}'
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

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.

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

Actions used in this workflow