name: hotpath-profile

on:
  pull_request:
    branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always

jobs:
  profile:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout PR HEAD
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
      
      - name: Setup Rust
        uses: actions-rust-lang/setup-rust-toolchain@v1
      
      - name: Run timing profiling on HEAD
        env:
          HOTPATH_JSON: "true"
        run: |
          cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/head_timing.json
      
      - name: Run allocation profiling on HEAD
        env:
          HOTPATH_JSON: "true"
        run: |
          cargo run --features='hotpath,hotpath-alloc' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/head_alloc.json
      
      - name: Checkout base branch
        run: |
          git checkout ${{ github.event.pull_request.base.sha }}
      
      - name: Run timing profiling on base
        env:
          HOTPATH_JSON: "true"
        run: |
          cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/base_timing.json || echo '{}' > /tmp/base_timing.json
      
      - name: Run allocation profiling on base
        env:
          HOTPATH_JSON: "true"
        run: |
          cargo run --features='hotpath,hotpath-alloc' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/base_alloc.json || echo '{}' > /tmp/base_alloc.json
      
      - name: Save PR number
        run: |
          echo '${{ github.event.pull_request.number }}' > /tmp/pr_number.txt
      
      - name: Upload profiling results
        uses: actions/upload-artifact@v5
        with:
          name: hotpath-results
          path: |
            /tmp/head_timing.json
            /tmp/head_alloc.json
            /tmp/base_timing.json
            /tmp/base_alloc.json
            /tmp/pr_number.txt
          retention-days: 1