Ecole de Technologie Supérieure

Game Engine Comparative Anatomy

This analysis explores the architectural commonalities and differences between game engines by comparing the call graphs of two open-source C++ engines: Godot 3.4.4 and Urho3D 1.8.

• A comparative analysis of Godot 3.4.4 and Urho3D 1.8 using Callgrind profiling reveals that despite similar feature sets, the two engines utilize fundamentally different internal execution flows.
• Godot 3.4.4 prioritizes window initialization before scene creation, whereas Urho3D 1.8 initializes graphics objects as its primary startup step.
• Both Godot 3.4.4 and Urho3D 1.8 demonstrate architectural inefficiency by initializing subsystems like UI and class registration even when those features are not utilized by the base project.