benchmark.yml

name: zThread Continuous Performance Benchmark Suite

on:
  workflow_dispatch:

jobs:
  # Single benchmark job — runs all JMH suites sequentially
  benchmarks:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    timeout-minutes: 45
    steps:
      - uses: actions/checkout@v7
        with:
          token: ${{ secrets.AUTO_COMMIT_PAT || github.token }}

      - name: Set up JDK 25
        uses: actions/setup-java@v6
        with:
          java-version: '25'
          distribution: 'temurin'

      - name: Compile Benchmark Module
        run: ./mvnw compile test-compile -pl zthread-benchmark --also-make -DskipTests=true

      - name: Run JMH Microbenchmarks
        run: |
          for suite in throughput eventfd inotify timers; do
            echo "::group::Running $suite benchmarks"
            ./mvnw test -pl zthread-benchmark --also-make -DskipTests=false -Dbenchmark.suite=$suite || true
            echo "::endgroup::"
          done
        continue-on-error: true

      - name: Run Scaling & Idle Benchmarks
        run: |
          for suite in scaling idle; do
            echo "::group::Running $suite benchmarks"
            ./mvnw test -pl zthread-benchmark --also-make -DskipTests=false -Dbenchmark.suite=$suite || true
            echo "::endgroup::"
          done
        continue-on-error: true

      - name: Upload Benchmark Results
        uses: actions/upload-artifact@v7
        if: always()
        with:
          name: benchmark-results
          path: zthread-benchmark/target/benchmark-results/*.json
          if-no-files-found: ignore

      - name: Set up Python
        uses: actions/setup-python@v7
        with:
          python-version: '3.12'

      - name: Install Charting Dependencies
        run: pip install matplotlib pandas seaborn tabulate

      - name: Generate SVG Charts and Update README.md
        run: python3 scripts/generate_report.py
        if: github.ref == 'refs/heads/master'
        continue-on-error: true

      - name: Commit & Push Updated README & Benchmark Assets
        if: github.ref == 'refs/heads/master'
        uses: stefanzweifel/git-auto-commit-action@v7
        with:
          commit_message: "chrono(benchmark): auto-update performance dashboard & SVG charts"
          file_pattern: "README.md assets/benchmarks/*"