🤖 Update Benchmark Results

[thomhurst]

Automated Benchmark Update

This PR updates the benchmark documentation with the latest results from the Speed Comparison workflow.

Benchmarks Produced

Individual benchmark artifacts are available for download:

• benchmark-DataDrivenTests
• benchmark-AsyncTests
• benchmark-ScaleTests
• benchmark-MatrixTests
• benchmark-MassiveParallelTests
• benchmark-SetupTeardownTests
• benchmark-BuildTime
• benchmark-summary (aggregated overview)

Runtime Benchmarks

• AsyncTests
• DataDrivenTests
• MassiveParallelTests
• MatrixTests
• ScaleTests
• SetupTeardownTests

Build Benchmarks

• BuildTime
• 2025-11-15
• Ubuntu Latest • .NET SDK 10.0.100

Changes

• Updated benchmark data in docs/static/benchmarks/latest.json
• Updated historical trends in docs/static/benchmarks/historical.json
• Regenerated benchmark documentation in docs/docs/benchmarks/index.md
• Updated benchmark summary in docs/static/benchmarks/summary.json

Workflow Run

• Run ID: 19381270165
• Triggered: schedule
• Date:

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🤖 This PR was automatically created and will be merged automatically once CI checks pass.

[claude]

Claude finished @thomhurst's task —— View job

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🔍 PR Review in Progress

Reviewing the automated benchmark update PR for:

• Code quality and best practices
• Potential bugs or issues
• Performance considerations
• Security concerns
• Test coverage

Analysis Plan:

• Examine benchmark data structure and format
• Review documentation generation process
• Assess automation workflow security
• Check data validation and error handling
• Evaluate overall approach and maintainability

📋 Review Summary

Overall Assessment: ✅ This is a well-structured automated benchmark update system with good practices overall.

✅ Strengths

1. Clean Data Structure: The JSON format is well-structured with proper metadata (timestamps, environment info, versions)
2. Comprehensive Coverage: Tests multiple frameworks (TUnit, NUnit, MSTest, xUnit3) including AOT scenarios
3. Good Documentation: Auto-generated markdown with visual charts using Mermaid
4. Historical Tracking: Maintains historical data for trend analysis
5. Environment Consistency: Uses consistent Ubuntu environment and .NET SDK versions

⚠️ Areas for Improvement

Security Concerns

• Medium Priority: The workflow has broad write permissions for automated commits. Consider using more restricted tokens or branch protection rules
• Low Priority: No validation that benchmark data is within expected ranges (could help detect malicious/corrupted data)

Code Quality & Best Practices

• Missing Error Handling: /process-benchmarks.js:39-62 - No error handling for malformed markdown tables
• Data Validation Gap: No validation that benchmark results are reasonable (e.g., negative times, impossible performance gains)
• Historical Data Growth: historical.json will grow indefinitely - consider implementing data retention policies

Potential Bugs

• Parsing Robustness: The markdown table parser assumes a specific format but doesn't handle edge cases gracefully
• Number Parsing: /process-benchmarks.js:81-87 - parseMeanValue function doesn't handle all possible BenchmarkDotNet output formats
• File Path Assumptions: Hard-coded directory paths could break if workflow structure changes

Performance Considerations

• File Size Growth: latest.json (349 additions) will grow as more benchmark categories are added
• Processing Efficiency: Sequential file processing could be parallelized for larger datasets

🚨 Critical Issues

None found - This is a maintenance update that follows established patterns.

🔧 Recommendations

1. Add Data Validation:

   function validateBenchmarkData(data) {
     return data.every(row => 
       row.Mean && parseMeanValue(row.Mean) > 0 && 
       row.Version && row.Method
     );
   }

2. Improve Error Handling:

   function parseMarkdownTable(content) {
     try {
       // existing parsing logic
     } catch (error) {
       console.warn(`Failed to parse table: ${error.message}`);
       return null;
     }
   }

3. Historical Data Management: Implement data retention (e.g., keep last 90 days) to prevent unbounded growth

4. Security Enhancement: Consider using a dedicated service account with minimal permissions for automated commits

📊 Test Coverage Assessment

Status: ⚠️ Needs Attention

• No automated tests for the benchmark processing script
• No validation that generated documentation matches expected format
• Missing tests for edge cases in markdown parsing

Recommendation: Add unit tests for /process-benchmarks.js functions, especially table parsing and data validation.

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