LeoECS
A lightweight, high-performance C# Entity Component System framework with optional Unity integration.
What is LeoECS?
LeoECS is a lightweight Entity Component System framework for C# that enables data-oriented game development. It separates data (components) from logic (systems) to optimize performance and memory usage, with optional integration for Unity projects.
C# developers building high-performance games or simulations, particularly those using Unity or custom engines who want an ECS architecture without engine dependencies.
Developers choose LeoECS for its focus on zero allocations, minimal memory footprint, and engine-agnostic design, offering a clean separation of concerns and performance benefits over traditional object-oriented approaches.
Overview
LeoECS is a lightweight Entity Component System (ECS) framework for C# designed for game development. It focuses on performance, minimal memory allocations, and engine-agnostic architecture, making it suitable for high-performance game logic.
Key Features
- High Performance — Zero or minimal allocations, optimized memory usage, and fast iteration over entities.
- Engine-Agnostic — No dependencies on any game engine, though optional Unity integration is provided.
- Automatic Dependency Injection — Systems automatically receive EcsWorld and EcsFilter instances, with support for custom type injection.
- Flexible Filtering — EcsFilter supports up to 6 include and 2 exclude constraints for precise entity queries.
- One-Frame Components — Built-in support for components that automatically clear after one update cycle.
- Customizable Pools — Configurable cache sizes for entities, filters, and component pools via EcsWorldConfig.
Philosophy
LeoECS prioritizes performance and simplicity, avoiding thread safety and engine lock-in to give developers full control over their game architecture.
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