winrt-xaml 1.0.0

name: Benchmark Performance

on:
  pull_request:
    branches: [ main, master ]
  push:
    branches: [ main, master ]
  workflow_dispatch:

env:
  RUST_BACKTRACE: 1
  CARGO_TERM_COLOR: always

jobs:
  benchmark:
    name: Run Benchmarks
    runs-on: windows-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0  # Need full history for comparison

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

    - name: Cache cargo registry
      uses: actions/cache@v4
      with:
        path: ~/.cargo/registry
        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo index
      uses: actions/cache@v4
      with:
        path: ~/.cargo/git
        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache target directory
      uses: actions/cache@v4
      with:
        path: target
        key: ${{ runner.os }}-target-bench-${{ hashFiles('**/Cargo.lock') }}

    - name: Run infrastructure benchmarks
      run: |

        cargo bench --bench infrastructure_test --no-default-features -- --save-baseline current

    - name: Run optimized patterns benchmarks
      run: |

        cargo bench --bench optimized_patterns --no-default-features

    - name: Store benchmark results
      uses: benchmark-action/github-action-benchmark@v1
      with:
        name: WinRT-XAML Benchmarks
        tool: 'criterion'
        output-file-path: target/criterion/infrastructure_test/base/estimates.json
        github-token: ${{ secrets.GITHUB_TOKEN }}
        auto-push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
        alert-threshold: '110%'  # Alert if 10% slower
        comment-on-alert: true
        fail-on-alert: false
        alert-comment-cc-users: '@maintainers'

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

          target/criterion/
          !target/criterion/**/raw.csv
        retention-days: 30

    - name: Generate benchmark report
      if: github.event_name == 'pull_request'
      run: |

        echo "# Benchmark Results 📊" > benchmark-report.md
        echo "" >> benchmark-report.md
        echo "## Performance Summary" >> benchmark-report.md
        echo "" >> benchmark-report.md
        echo "Benchmarks completed successfully. Check the artifacts for detailed results." >> benchmark-report.md
        echo "" >> benchmark-report.md
        echo "### Quick Stats" >> benchmark-report.md
        echo "- ✅ Infrastructure tests: Completed" >> benchmark-report.md
        echo "- ✅ Optimized patterns: Completed" >> benchmark-report.md
        echo "" >> benchmark-report.md
        echo "### View Results" >> benchmark-report.md
        echo "Download the benchmark-results artifact to view detailed HTML reports." >> benchmark-report.md

    - name: Comment PR with results
      uses: actions/github-script@v7
      if: github.event_name == 'pull_request'
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |

          const fs = require('fs');
          const report = fs.readFileSync('benchmark-report.md', 'utf8');
          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: report
          });

  benchmark-comparison:
    name: Compare with Baseline
    runs-on: windows-latest
    if: github.event_name == 'pull_request'

    steps:
    - name: Checkout PR branch
      uses: actions/checkout@v4

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

    - name: Cache dependencies
      uses: actions/cache@v4
      with:
        path: |

          ~/.cargo/registry
          ~/.cargo/git
          target
        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}

    - name: Run benchmarks (PR)
      run: |

        cargo bench --bench infrastructure_test --no-default-features -- --save-baseline pr

    - name: Checkout base branch
      uses: actions/checkout@v4
      with:
        ref: ${{ github.base_ref }}
        clean: false

    - name: Run benchmarks (base)
      run: |

        cargo bench --bench infrastructure_test --no-default-features -- --save-baseline base

    - name: Checkout PR branch again
      uses: actions/checkout@v4
      with:
        clean: false

    - name: Compare benchmarks
      run: |

        cargo bench --bench infrastructure_test --no-default-features -- --baseline base > comparison.txt 2>&1 || true

    - name: Parse and report comparison
      shell: pwsh
      run: |

        $comparison = Get-Content comparison.txt -Raw

        $report = @"
        # 📊 Benchmark Comparison Report

        ## Performance Changes from Base Branch

        ``````
        $comparison
        ``````

        ### Legend
        - 🟢 **Improvement**: Faster than base
        - 🔴 **Regression**: Slower than base
        - ⚪ **No Change**: Within noise threshold

        ### Thresholds
        - ⚠️ **Warning**: >5% regression
        - 🚨 **Alert**: >10% regression

        "@

        Set-Content -Path comparison-report.md -Value $report

    - name: Comment PR with comparison
      uses: actions/github-script@v7
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |

          const fs = require('fs');
          const report = fs.readFileSync('comparison-report.md', 'utf8');
          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: report
          });