bench.yml

name: Benchmarks

on:
  workflow_dispatch: {}
  schedule:
    - cron: "0 6 * * 1"

jobs:
  bench:
    name: cargo bench (nightly)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Rust (nightly)
        uses: dtolnay/rust-toolchain@nightly

      - name: Cache cargo
        uses: Swatinem/rust-cache@v2
        with:
          save-if: ${{ github.ref == 'refs/heads/main' }}

      - name: Show toolchain
        run: |
          rustc -V
          cargo -V

      - name: Run benchmark
        env:
          RUSTFLAGS: "-C target-cpu=native"
        run: |
          cargo bench --features "std benchmark"

      - name: Compare benchmark vs disabled (example)
        run: |
          set -e
          echo "Running zero_overhead example with disabled mode (no-default-features)"
          cargo run --release --example zero_overhead --no-default-features > disabled.txt
          echo "Running overhead_compare example with benchmark mode (std+benchmark)"
          cargo run --release --example overhead_compare --no-default-features --features "std benchmark" > benchmark.txt
          echo "--- disabled.txt" && cat disabled.txt
          echo "--- benchmark.txt" && cat benchmark.txt

      - name: Upload compare artifacts
        uses: actions/upload-artifact@v4
        with:
          name: overhead-compare
          path: |
            disabled.txt
            benchmark.txt