benchmark.yml

name: Benchmark

on:
  workflow_run:
    workflows: ["Publish"]
    types: [completed]
  workflow_dispatch:

permissions: {}

jobs:
  benchmark:
    runs-on: ubuntu-latest
    if: >-
      github.event_name == 'workflow_dispatch' ||
      github.event.workflow_run.conclusion == 'success'
    permissions:
      contents: write
      pull-requests: write

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: main
          token: ${{ secrets.GITHUB_TOKEN }}

      - uses: actions/setup-node@v4
        with:
          node-version: "22"

      - run: npm install

      - name: Run benchmark
        run: node scripts/benchmark.js 2>/dev/null > benchmark-result.json

      - name: Update report
        run: node scripts/update-benchmark-report.js benchmark-result.json

      - name: Check for changes
        id: changes
        run: |
          if git diff --quiet HEAD -- generated/BENCHMARKS.md README.md; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Commit and push via PR
        if: steps.changes.outputs.changed == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          BRANCH="benchmark/update-$(date +%Y%m%d-%H%M%S)"
          git checkout -b "$BRANCH"
          git add generated/BENCHMARKS.md README.md
          git commit -m "docs: update performance benchmarks"
          git push origin "$BRANCH"

          gh pr create \
            --base main \
            --head "$BRANCH" \
            --title "docs: update performance benchmarks" \
            --body "Automated benchmark update from workflow run [#${{ github.run_number }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})."

      - name: Upload result artifact
        uses: actions/upload-artifact@v4
        with:
          name: benchmark-result
          path: benchmark-result.json