5.8Advanced Optimization Techniques

Reusable Workflows

Extract common patterns into reusable workflows to avoid duplication:

# .github/workflows/reusable-test.yml
on:
  workflow_call:
    inputs:
      test-command:
        required: true
        type: string
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 24
          cache: 'npm'
      - run: npm ci
      - run: ${{ inputs.test-command }}

Dependency Graph Optimization

If your repository has multiple packages (monorepo), only test packages affected by the change:

# Use a tool like Nx or Turborepo to detect affected packages
- run: npx nx affected --target=test --base=origin/main --head=HEAD