- Add cache-aligned entry structures (alignas(16))
- Improve load factor from 75% to 62.5% for better performance
- Add memory prefetching hints for cache optimization
- Implement Robin Hood probing distance tracking
- Add comprehensive performance monitoring metrics
- Include performance test harness for benchmarking
These changes target the Round 1 performance improvements outlined
in the Z3 performance plan, focusing on reducing cache misses and
improving memory access patterns in hash table operations.
