# \#ecs

**URL:** https://discourse.julialang.org/tag/ecs/1820.md

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## [\[ANN\] Ark.jl v0.5 - Archetype-based Entity Component System (ECS) for Julia](https://discourse.julialang.org/t/ann-ark-jl-v0-5-archetype-based-entity-component-system-ecs-for-julia/137380)

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**Author:** [@Tortar](https://discourse.julialang.org/u/Tortar)\
**Replies:** 3\
**Last updated:** [June 5, 2026, 3:19pm UTC](https://discourse.julialang.org/t/ann-ark-jl-v0-5-archetype-based-entity-component-system-ecs-for-julia/137380 "2026-06-05T15:19:07Z")

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Hi all! Happy to announce the release of Ark.jl 0.5. It was a slow burning effort this time, where we tried to make the package more robust in several aspects. It took time and effort, but I can say we made some good pr…

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## [\[ANN\] Ark.jl v0.2.0 - New features for the Julia ECS for games and simulations](https://discourse.julialang.org/t/ann-ark-jl-v0-2-0-new-features-for-the-julia-ecs-for-games-and-simulations/134142)

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**Author:** [@mlange-42](https://discourse.julialang.org/u/mlange-42)\
**Replies:** 0\
**Last updated:** [November 26, 2025, 1:27pm UTC](https://discourse.julialang.org/t/ann-ark-jl-v0-2-0-new-features-for-the-julia-ecs-for-games-and-simulations/134142 "2025-11-26T13:27:03Z")

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Two weeks and roughly 100 PRs after the last release, we are pleased to announce Ark.jl v0.2.0! This release comes with several new features, extended documentation and some performance improvements, but also with a few…

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## [ReactiveECS.jl v2.0.0: Breaking Changes for Massive Performance Boosts](https://discourse.julialang.org/t/reactiveecs-jl-v2-0-0-breaking-changes-for-massive-performance-boosts/130564)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 3\
**Last updated:** [July 10, 2025, 10:00am UTC](https://discourse.julialang.org/t/reactiveecs-jl-v2-0-0-breaking-changes-for-massive-performance-boosts/130564 "2025-07-10T10:00:19Z")

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Hi everyone! I’m happy to present ReactiveECS.jl v2.0.0! For those unfamiliar with the package, you can check out the original post. This new version follows v1.0.0, which received heavy criticism on the Flecs Discord—…

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## [Arceus.jl — A Lightning-Fast Behavior Resolution System](https://discourse.julialang.org/t/arceus-jl-a-lightning-fast-behavior-resolution-system/130321)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 24\
**Last updated:** [July 3, 2025, 12:12am UTC](https://discourse.julialang.org/t/arceus-jl-a-lightning-fast-behavior-resolution-system/130321 "2025-07-03T00:12:58Z")

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Hi all, I’m happy to present Arceus.jl, a fork of a high-performance AliceRoselia’s original package Arceus, which introduces a novel way to resolve behaviors for entities based on their component sets—using magic bitbo…

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## [ReactiveECS vs Overseer: Reactive ECS is 4.6x faster than Overseer for 100k entities](https://discourse.julialang.org/t/reactiveecs-vs-overseer-reactive-ecs-is-4-6x-faster-than-overseer-for-100k-entities/130282)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 3\
**Last updated:** [July 2, 2025, 9:16am UTC](https://discourse.julialang.org/t/reactiveecs-vs-overseer-reactive-ecs-is-4-6x-faster-than-overseer-for-100k-entities/130282 "2025-07-02T09:16:44Z")

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Hello guys. I recently ran a comparison between ReactiveECS.jl (RECS) and Overseer.jl, two powerful ECS (Entity-Component-System) frameworks. The results are eye-opening and show that both frameworks have unique strengt…

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## [ReactiveECS.jl v1.0.0: Powerful reactive ECS balancing flexibility and performances](https://discourse.julialang.org/t/reactiveecs-jl-v1-0-0-powerful-reactive-ecs-balancing-flexibility-and-performances/130216)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 0\
**Last updated:** [June 26, 2025, 12:55am UTC](https://discourse.julialang.org/t/reactiveecs-jl-v1-0-0-powerful-reactive-ecs-balancing-flexibility-and-performances/130216 "2025-06-26T00:55:11Z")

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Hello guys… Happy today to provide you the latest version of ReactiveECS.jl (look at this post if you don’t know yet the package.). Adding some powerful features to fills all the remaining gaps. Without further ado, let…

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## [RECS: A Reactive ECS Framework for High-Performance Simulations in Julia](https://discourse.julialang.org/t/recs-a-reactive-ecs-framework-for-high-performance-simulations-in-julia/130098)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 16\
**Last updated:** [June 23, 2025, 5:09pm UTC](https://discourse.julialang.org/t/recs-a-reactive-ecs-framework-for-high-performance-simulations-in-julia/130098 "2025-06-23T17:09:00Z")

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I am thrilled to introduce RECS (Reactive Entity-Component-System), a new Julia package designed for building high-performance, modular, and reactive simulations, with a focus on game development and scientific applicati…