Remove quadradic bottleneck, use binary patt match. 449 tests, 0 failures, 36 excluded

Author: NSHkr

PERF_MONITOR.md

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+# Simple Performance Monitor
+
+## Usage
+
+```bash
+# 1. Set baseline (run once before optimizations)
+mix run scripts/perf_monitor.exs baseline
+
+# 2. Check current performance (run anytime)
+mix run scripts/perf_monitor.exs current
+
+# 3. Compare with baseline (run after changes)  
+mix run scripts/perf_monitor.exs compare
+```
+
+## What it tracks
+
+- **Layer 3 processing time** for 10, 25, 50, 100 objects
+- **Processing rate** (KB/s)
+- **Scaling behavior** (Linear vs Quadratic)
+- **Improvement ratio** vs baseline
+
+## Current baseline (O(n²) quadratic)
+
+- 10 objects: ~5ms
+- 25 objects: ~18ms  
+- 50 objects: ~66ms
+- 100 objects: ~291ms
+
+## Optimization goals
+
+- **5x improvement**: Phase 1 (IO Lists)
+- **10x improvement**: Phase 2 (Binary Pattern Matching)  
+- **20x improvement**: Phase 3 (Single-Pass)
+- **30x improvement**: Phase 4 (Full Optimization)
+
+**Target: 100 objects in <10ms (vs current 291ms)**