Benchmark suite measuring entity performance at scale:
- B1: Entity creation (measures allocation overhead)
- B2: Full iteration (measures cache locality)
- B3: Single range query (measures O(n) scan cost)
- B4: N×N visibility (the "what can everyone see" problem)
- B5: Movement churn (baseline for spatial index overhead)
Key findings at 2,000 entities on 100×100 grid:
- Creation: 75k entities/sec
- Range query: 0.05ms (O(n) - checks all entities)
- N×N visibility: 128ms total (O(n²))
- EntityCollection iteration 60× slower than direct iteration
Addresses #115, addresses #117🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
