Performance

• Normal React performance tips: React.memo, useMemo, useCallback etc.
• Normalize large array state via createEntityAdapter API:
  • Use Ids array as minimal core data (other than whole Data[]).
  • Fast element lookup in normalized state (other than slow Array.find()).
• Create memorized selectors via createSelector API.

Code Splitting

• Redux Code Splitting Guide.
• Redux Dynamic Modules: Modularize Redux by dynamically loading reducers and middlewares (contribute to code splitting).

Pitfalls

• All reducers are called to produce the next store state.
• All mapStateToProps/useSelectors of mounted components are called.
• As every mapStateToProps/useSelector that returned a different reference from the previous render, the associated components are rendered (re-rendering problem).