Add comprehensive analysis of ZScream vs YAZE overworld implementations

- Introduced a detailed comparison document highlighting the functional equivalence between ZScream (C#) and YAZE (C++) overworld loading logic. - Verified key areas such as tile loading, expansion detection, map decompression, and coordinate calculations, confirming consistent behavior across both implementations. - Documented differences and improvements in YAZE, including enhanced error handling and memory management. - Provided validation results from integration tests ensuring data integrity and compatibility with existing ROMs.
2025-09-28 22:49:29 -04:00
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+# Editor Performance Monitoring Setup
+
+## Overview
+
+Successfully implemented comprehensive performance monitoring across all YAZE editors to identify loading bottlenecks and optimize the entire application startup process.
+
+## ✅ **Completed Tasks**
+
+### 1. **Performance Timer Standardization**
+- Cleaned up and standardized all performance monitoring timers
+- Added consistent `core::ScopedTimer` usage across all editors
+- Integrated with the existing `core::PerformanceMonitor` system
+
+### 2. **Editor Timing Implementation**
+Added performance timing to all 8 editor `Load()` methods:
+
+| Editor | File | Status |
+|--------|------|--------|
+| **OverworldEditor** | `overworld/overworld_editor.cc` | ✅ Already had timing |
+| **DungeonEditor** | `dungeon/dungeon_editor.cc` | ✅ Added timing |
+| **ScreenEditor** | `graphics/screen_editor.cc` | ✅ Added timing |
+| **SpriteEditor** | `sprite/sprite_editor.cc` | ✅ Added timing |
+| **MessageEditor** | `message/message_editor.cc` | ✅ Added timing |
+| **MusicEditor** | `music/music_editor.cc` | ✅ Added timing |
+| **PaletteEditor** | `graphics/palette_editor.cc` | ✅ Added timing |
+| **SettingsEditor** | `system/settings_editor.cc` | ✅ Added timing |
+
+### 3. **Implementation Details**
+
+Each editor now includes:
+```cpp
+#include "app/core/performance_monitor.h"
+
+absl::Status [EditorName]::Load() {
+  core::ScopedTimer timer("[EditorName]::Load");
+  
+  // ... existing loading logic ...
+  
+  return absl::OkStatus();
+}
+```
+
+## 🎯 **Expected Results**
+
+When you run the application and load a ROM, you'll now see detailed timing for each editor:
+
+```
+=== Performance Summary ===
+Operation                     Count       Total (ms)     Average (ms)   
+------------------------------------------------------------------------
+OverworldEditor::Load         1           XXX            XXX           
+DungeonEditor::Load           1           XXX            XXX           
+ScreenEditor::Load            1           XXX            XXX           
+SpriteEditor::Load            1           XXX            XXX           
+MessageEditor::Load           1           XXX            XXX           
+MusicEditor::Load             1           XXX            XXX           
+PaletteEditor::Load           1           XXX            XXX           
+SettingsEditor::Load          1           XXX            XXX           
+LoadAllGraphicsData           1           XXX            XXX           
+------------------------------------------------------------------------
+```
+
+## 🔍 **Bottleneck Identification Strategy**
+
+### **Phase 1: Baseline Measurement**
+Run the application and collect performance data to identify:
+- Which editors are slowest to load
+- Total loading time breakdown
+- Memory usage patterns during loading
+
+### **Phase 2: Targeted Optimization**
+Based on the results, focus optimization efforts on:
+- **Slowest Editors**: Apply lazy loading or deferred initialization
+- **Memory-Intensive Operations**: Implement progressive loading
+- **I/O Bound Operations**: Add caching or parallel processing
+
+### **Phase 3: Advanced Optimizations**
+- **Parallel Editor Loading**: Load independent editors concurrently
+- **Predictive Loading**: Pre-load editors likely to be used
+- **Resource Pooling**: Share resources between editors
+
+## 🚀 **Next Steps**
+
+1. **Run Performance Test**: Load a ROM and collect the performance summary
+2. **Identify Bottlenecks**: Find the slowest editors (likely candidates: DungeonEditor, ScreenEditor)
+3. **Apply Optimizations**: Implement lazy loading for slow editors
+4. **Measure Improvements**: Compare before/after performance
+
+## 📊 **Expected Findings**
+
+Based on typical patterns, we expect to find:
+
+- **OverworldEditor**: Already optimized (should be fast)
+- **DungeonEditor**: Likely slow (complex dungeon data loading)
+- **ScreenEditor**: Potentially slow (graphics processing)
+- **SpriteEditor**: Likely fast (minimal loading)
+- **MessageEditor**: Likely fast (text data only)
+- **MusicEditor**: Likely fast (minimal loading)
+- **PaletteEditor**: Likely fast (small palette data)
+- **SettingsEditor**: Likely fast (configuration only)
+
+## 🎉 **Benefits**
+
+- **Complete Visibility**: See exactly where time is spent during ROM loading
+- **Targeted Optimization**: Focus efforts on the real bottlenecks
+- **Measurable Progress**: Track improvements with concrete metrics
+- **User Experience**: Faster application startup and responsiveness
+
+The performance monitoring system is now ready to identify and help optimize the remaining bottlenecks in YAZE's loading process!