先來看看redux-immutable上的解釋
Using combineReducers it is possible to provide createStore with initial state using Immutable Iterable type, i.e:
import { createStore } from 'redux';
import { combineReducers } from 'redux-immutablejs';

import Immutable from 'immutable';
import * as reducers from './reducers';

const reducer = combineReducers(reducers);
const state = Immutable.fromJS({});

const store = reducer(state);
export default createStore(reducer, store);

上面這段代碼講的是redux-immutablejs'提供了combineReducers的功能，那么redux本身就有combineReducers的方法可以使用，為什么還需要一個redux-immutable呢？
在我看來，這個插件多余了，原作者可能是想將redux的combineReducers功能提取出來作為一個單獨的中間件使用，但是redux開發(fā)者最痛恨的是什么？性能！開發(fā)一個簡單的網(wǎng)站都需要一大堆插件，網(wǎng)站體積變的很龐大，拜托。。千萬別再搞那么多中間件了。