readcon-core 0.14.0

An oxidized single and multiple CON file reader and writer with FFI bindings for ergonomic C/C++ usage.
Documentation 
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name: Benchmark PR
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true
on:
  pull_request:
    branches: [main]

env:
  SCCACHE_GHA_ENABLED: "true"

jobs:
  benchmark:
    strategy:
      fail-fast: false
      matrix:
        include:
          - label: main
            sha: ${{ github.event.pull_request.base.sha }}
          - label: pr
            sha: ${{ github.event.pull_request.head.sha }}
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Checkout target commit
        run: |
          mkdir -p /tmp/_bench_preserve
          cp -r benches/ /tmp/_bench_preserve/
          git checkout -f ${{ matrix.sha }}
          git clean -fd
          cp -r /tmp/_bench_preserve/benches/ benches/

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

      - name: Configure sccache
        uses: mozilla-actions/sccache-action@v0.0.9
        with:
          version: "v0.10.0"

      - name: Setup sccache environment
        run: |
          echo "RUSTC_WRAPPER=sccache" >> $GITHUB_ENV

      - name: Run benchmarks
        run: |
          cargo bench --bench iterator_bench -- --save-baseline ${{ matrix.label }}

      - name: Export Criterion results
        run: |
          tar czf criterion-${{ matrix.label }}.tar.gz -C target criterion/

      - uses: actions/upload-artifact@v4
        with:
          name: criterion-${{ matrix.label }}
          path: criterion-${{ matrix.label }}.tar.gz
          retention-days: 7

  compare:
    needs: benchmark
    runs-on: ubuntu-latest
    steps:
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Install critcmp
        run: cargo install critcmp

      - name: Download main results
        uses: actions/download-artifact@v4
        with:
          name: criterion-main
          path: .

      - name: Download PR results
        uses: actions/download-artifact@v4
        with:
          name: criterion-pr
          path: .

      - name: Extract and compare
        run: |
          mkdir -p target
          tar xzf criterion-main.tar.gz -C target/
          tar xzf criterion-pr.tar.gz -C target/
          mkdir -p results
          critcmp main pr --threshold 5 > results/comparison.txt || true
          if [ ! -s results/comparison.txt ]; then
            echo "No benchmark comparison output" > results/comparison.txt
          fi
          cat results/comparison.txt

      - name: Write metadata
        run: |
          echo "main_sha=${{ github.event.pull_request.base.sha }}" > results/metadata.txt
          echo "pr_sha=${{ github.event.pull_request.head.sha }}" >> results/metadata.txt

      - uses: actions/upload-artifact@v4
        with:
          name: benchmark-results
          path: results/
          retention-days: 7