Reactive System Execution With Component Change Event Subscriptions

Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity

Unique: Implements reactive systems via component change event subscriptions with automatic batching and frame-synchronized execution, rather than requiring manual polling or observer pattern implementation

vs others: More efficient than polling-based systems (e.g., traditional Update() loops) and more declarative than manual observer patterns, reducing boilerplate while improving frame-time consistency