benchmarks.yml

name: Benchmarks

on:
  pull_request:
    types: [labeled]
  push:
    branches: [master]

env:
  ASV_FACTOR: "1.2"

jobs:
  benchmarks:
    if: >
      (github.event_name == 'push') ||
      (github.event_name == 'pull_request' && github.event.label.name == 'performance')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: actions/setup-python@v5
        with:
          python-version: "3.13"

      - name: Install ASV and virtualenv
        run: pip install asv virtualenv

      - name: Configure ASV machine
        working-directory: benchmarks
        run: asv machine --yes

      - name: Run benchmarks (PR)
        if: github.event_name == 'pull_request'
        working-directory: benchmarks
        run: |
          asv continuous origin/master HEAD \
            --factor $ASV_FACTOR \
            --bench "^(Slope|Proximity|Zonal|CostDistance|Focal)" \
            | tee bench_output.txt

      - name: Run benchmarks (push to master)
        if: github.event_name == 'push'
        working-directory: benchmarks
        run: |
          asv run HEAD^! \
            --bench "^(Slope|Proximity|Zonal|CostDistance|Focal)" \
            | tee bench_output.txt

      - name: Check for regressions
        working-directory: benchmarks
        run: |
          if grep -q "REGRESSION" bench_output.txt; then
            echo "::error::Performance regression detected (>${ASV_FACTOR}x slower)"
            cat bench_output.txt
            exit 1
          fi

      - name: Upload benchmark results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: benchmark-results
          path: |
            benchmarks/bench_output.txt
            benchmarks/.asv/results/