Redux In Web Workers: Off-Main-Thread Redux Reducers and Middleware

Redux In Web Workers: Off-Main-Thread Redux Reducers and Middleware

Several experiments to off load Redux, often used with React, from the main thread, and run some or all of Redux store in Web Workers. React is a UI library, and it’s intended to run in the main UI thread. Redux is usually UI agnostic, so we can run it in a worker thread.

Introduction

Redux is a framework-agnostic library for global state. It’s often used with React.

While I like the abstraction of Redux, React will introduce Concurrent Mode in the near future. If we want to get benefit of useTransition, state must be inside React to allow state branching. That means we can’t get the benefit with Redux.

I’ve been developing React Tracked for global state that allows state branching. It works well in Concurrent Mode. That leaves me a question: What is a use case that only Redux can do.

The reason Redux can’t allow state branching is that the state is in the external store. So, what is the benefit of having an external store. Redux Toolkit can be one answer. I have another answer, an external store allow off main thread.

React is a UI library, and it’s intended to run in the main UI thread. Redux is usually UI agnostic, so we can run it in a worker thread.

There has been several experiments to off load Redux from the main thread, and run some or all of Redux work in Web Workers. I’ve developed a library for off load the entire Redux store.

redux-in-worker

The library is called redux-in-worker. Please check out the GitHub repository.

https://github.com/dai-shi/redux-in-worker

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