μECS - a tiny and fast ECS library

• uecs

  2 34 0.0 TypeScript

  Micro ECS

• js-ecs-benchmarks

  1 51 0.0 JavaScript

It is not slow either, according to this benchmark, it is currently one of the fastest ECS libraries available(*)

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• asteroids

  1 1 3.2 TypeScript

  Asteroids (by blixt)

Here is an Asteroids game built with it: https://github.com/blixt/asteroids/blob/master/src/game.ts

• specs

  13 2,402 7.2 Rust

  Specs - Parallel ECS (by amethyst)

  

Fair enough on leaving parts up to other code instead of the library. I started my ECS with the idea of optimized storage (eg hash maps for sparse components) and indexing (which is why formal Not helps a lot, but indeed Maybe is only sugar for less code). I really liked this Rust ECS which also does parallelization, which makes it important for the ECS to also know which order the systems execute in, and their dependencies on each other (something I started doing but never finished): https://github.com/amethyst/specs

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