Add comprehensive HashSet vs BitString intersection performance comparison #174
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Adding CLAUDE.md with task information for AI processing. This file will be removed when the task is complete. Issue: #52
…rison This commit addresses issue #52 by implementing a detailed benchmark suite that compares intersection performance between HashSet and BitString collections. **Key additions:** - New IntersectionPerformanceComparison.cs benchmark class with 11 different intersection methods - Comprehensive test matrix: 4 sizes × 3 fill rates × 3 intersection rates = 36 scenarios - Multiple BitString intersection variants: And, VectorAnd, ParallelAnd, ParallelVectorAnd - HashSet intersection methods: IntersectWith, Intersect.Count(), Overlaps - Updated Program.cs to support both benchmark types via command line arguments - Detailed documentation explaining usage and expected performance characteristics **Benchmark coverage:** - Collection sizes: 1K, 10K, 100K, 1M elements - Fill rates: 0.1 (sparse), 0.5 (medium), 0.9 (dense) - Intersection rates: 0.1, 0.3, 0.7 (low to high overlap) - Memory and CPU performance analysis across different data patterns **Usage:** - `dotnet run intersection` - Run intersection performance comparison - `dotnet run bitstring` - Run original BitString benchmarks - `dotnet run` - Show help 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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🤖 AI-Powered Solution
This pull request solves issue #52 by implementing a comprehensive benchmark suite to compare HashSet and BitString intersection performance.
📋 Issue Reference
Fixes #52
✅ Implementation Summary
New benchmark class:
IntersectionPerformanceComparison.cs[MemoryDiagnoser]attributeMultiple BitString intersection variants tested:
BitStringIntersection()- Basic And() operationBitStringVectorIntersection()- SIMD-optimized VectorAnd()BitStringParallelIntersection()- Multi-threaded ParallelAnd()BitStringParallelVectorIntersection()- Combined parallel + SIMDBitStringGetCommonIndices()- Direct common indices retrievalBitStringCountCommonBits()- Efficient bit countingBitStringHaveCommonBits()- Fast existence checkHashSet intersection methods:
HashSetIntersection()- Standard IntersectWith() [baseline]HashSetIntersectionCount()- LINQ-based countingHashSetHaveCommon()- Overlaps() method📊 Test Parameters
🚀 Usage
📈 Expected Performance Insights
📚 Documentation
Comprehensive documentation added in
examples/intersection-performance-comparison.mdcovering:🤖 Generated with Claude Code