bench.yml

name: Benchmarks

on:
  push:
    branches: [master, main]
  pull_request:
    paths:
      - 'crates/**'
      - 'Cargo.toml'
      - '.github/workflows/bench.yml'

permissions:
  contents: write
  pull-requests: write

concurrency:
  # Serialize per ref so concurrent runs never race on the gh-pages auto-push.
  group: bench-${{ github.ref }}
  cancel-in-progress: false

jobs:
  bench:
    name: Run + track criterion benches
    timeout-minutes: 45
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install stable Rust toolchain
        uses: dtolnay/rust-toolchain@1.95.0
      - name: Cache cargo registry and build artifacts
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: bench-run
      - name: Run criterion benches (machine-readable)
        run: |
          set -o pipefail
          # Only the criterion benches accept `--output-format bencher`; the
          # per-crate libtest harness bench targets reject it ("Unrecognized
          # option: 'output-format'") and abort `--workspace`, leaving an empty
          # file. Select the criterion benches explicitly so the run emits
          # bencher-format output for github-action-benchmark to parse.
          cargo bench -p coregraph-extractor --bench build_graph \
                      -p coregraph-query --bench impact \
                      -- --output-format bencher | tee bench-output.txt
      - name: Compare against main + alert on regression
        uses: benchmark-action/github-action-benchmark@v1
        with:
          tool: 'cargo'
          output-file-path: bench-output.txt
          github-token: ${{ secrets.GITHUB_TOKEN }}
          alert-threshold: '120%'
          comment-on-alert: true
          fail-on-alert: false
          alert-comment-cc-users: ''
          auto-push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
          gh-pages-branch: gh-pages
          benchmark-data-dir-path: bench