benchmark.yml

name: Performance Benchmarks

permissions:
  contents: read

# Run benchmarks on a schedule and manual trigger only
on:
  # Run weekly on Sunday at 2 AM UTC
  schedule:
    - cron: "0 2 * * 0"

  # Allow manual triggering for on-demand performance testing
  workflow_dispatch:

env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: full

jobs:
  benchmark:
    name: Run Performance Benchmarks
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # Full history for performance comparison

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Install system dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y protobuf-compiler

      - name: Cache Rust dependencies
        uses: Swatinem/rust-cache@v2
        with:
          # Cache key includes benchmark to avoid interference with test cache
          key: benchmark-${{ runner.os }}-${{ hashFiles('**/Cargo.lock') }}

      - name: Run benchmarks
        run: |
          echo "========================================="
          echo "Running d-engine Performance Benchmarks"
          echo "========================================="
          echo ""
          echo "Performance Targets:"
          echo "  • Without TTL: < 10ns overhead"
          echo "  • With TTL passive check: < 50ns overhead"
          echo "  • Piggyback cleanup: < 1ms"
          echo ""

          # Run benchmarks and save output
          cargo bench --package d-engine-server 2>&1 | tee benchmark_output.txt

          echo ""
          echo "✅ Benchmarks completed successfully"

      - name: Upload detailed results as artifact
        uses: actions/upload-artifact@v4
        with:
          name: benchmark-results
          path: |
            target/criterion/
            benchmark_output.txt
          retention-days: 30

      - name: Performance summary
        run: |
          echo "========================================="
          echo "Performance Benchmark Summary"
          echo "========================================="
          echo ""
          echo "📊 Benchmark results uploaded as artifacts"
          echo ""
          echo "To view detailed results:"
          echo "  1. Download the artifact"
          echo "  2. Open target/criterion/report/index.html in your browser"
          echo ""
          echo "✅ Performance monitoring complete"