performance.yml

# Performance Regression CI
# Runs on every push/PR to detect performance regressions early
# Fails if thresholds are exceeded

name: Performance Regression

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

concurrency:
  group: perf-${{ github.ref }}
  cancel-in-progress: true

jobs:
  performance-check:
    name: Performance Regression Check
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        
      - name: Setup JDK 17
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '17'
          cache: 'gradle'
          
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v3
        
      - name: Run Performance Benchmarks
        id: benchmark
        run: |
          echo "🚀 Running performance regression tests..."
          ./gradlew :common:desktopTest \
            --tests "*PerformanceBenchmarkTest*" \
            --tests "*PerformanceRegressionTest*" \
            --no-daemon \
            --console=plain 2>&1 | tee benchmark-output.txt
          
      - name: Check for Regressions
        run: |
          echo "📊 Checking for performance regressions..."
          
          # Check if tests passed
          if grep -q "BUILD SUCCESSFUL" benchmark-output.txt; then
            echo "✅ All performance tests passed - no regressions detected"
            echo "PERFORMANCE_STATUS=pass" >> $GITHUB_ENV
          else
            echo "❌ Performance regression detected!"
            echo "PERFORMANCE_STATUS=fail" >> $GITHUB_ENV
            exit 1
          fi
          
      - name: Generate Performance Summary
        if: always()
        run: |
          mkdir -p performance-results
          cat <<EOF > performance-results/summary.md
          # Performance Regression Report
          
          **Commit:** \`${{ github.sha }}\`
          **Branch:** \`${{ github.ref_name }}\`
          **Date:** $(date -u +"%Y-%m-%d %H:%M UTC")
          **Status:** ${{ env.PERFORMANCE_STATUS == 'pass' && '✅ PASS' || '❌ FAIL' }}
          
          ## Thresholds
          
          | Metric | Target | Status |
          |--------|--------|--------|
          | Full URL Analysis | <50ms | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          | P99 Latency | <50ms | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          | Heuristics Engine | <10ms | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          | ML Inference | <5ms | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          | Brand Detection | <15ms | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          | Throughput | >100 URLs/sec | ${{ env.PERFORMANCE_STATUS == 'pass' && '✅' || '❌' }} |
          
          ## Why This Matters
          
          - **User Experience:** <50ms analysis enables real-time feedback during QR scanning
          - **Battery Life:** Fast execution minimizes CPU time and energy consumption
          - **Responsiveness:** No UI jank or delay during analysis
          EOF
          
          cat performance-results/summary.md
          
      - name: Upload Performance Report
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: performance-report
          path: performance-results/
          retention-days: 30
          
      - name: Comment on PR
        if: github.event_name == 'pull_request' && always()
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            let report = '## 📊 Performance Check\n\n';
            
            try {
              report += fs.readFileSync('performance-results/summary.md', 'utf8');
            } catch (e) {
              report += '${{ env.PERFORMANCE_STATUS == "pass" && "✅ All performance tests passed!" || "❌ Performance regression detected!" }}';
            }
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: report
            });