React Native 应用程序中的 Redux 在处理大量数据时非常慢

使用Redux是React Native应用程序开发中常用的状态管理工具之一。然而，当处理大量数据时，Redux可能会变得非常慢，从而影响应用程序的性能和用户体验。本文将探讨Redux在处理大量数据时的性能问题，并提供一些优化策略。

javascript
// 示例代码
const loadUsers = (page) => {
  // 根据页码加载用户数据
  // ...
}
const UserList = () => {
  const dispatch = useDispatch();
  const users = useSelector(state => state.users);
  const currentPage = useSelector(state => state.currentPage);
  useEffect(() => {
    dispatch(loadUsers(currentPage));
  }, [currentPage]);
  const handleScroll = () => {
    // 当用户滚动到页面底部时，加载下一页数据
    if (window.innerHeight + window.scrollY >= document.body.offsetHeight) {
      dispatch(setCurrentPage(currentPage + 1));
    }
  };
  return (
    
      {users.map(user => (
        
      ))}
    
  );
};

javascript
// 示例代码
import { createSelector } from 'reselect';
const getUsers = state => state.users;
const getFilteredUsers = createSelector(
  getUsers,
  users => users.filter(user => user.age > 18)
);
const UserList = () => {
  const filteredUsers = useSelector(getFilteredUsers);
  return (
    
      {filteredUsers.map(user => (
        
      ))}
    
  );
};

javascript
// 示例代码
import { Map } from 'immutable';
const initialState = Map({
  users: [],
});
const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'ADD_USER':
      return state.update('users', users => users.concat(action.payload));
    default:
      return state;
  }
};

javascript
// 示例代码（使用Redux Thunk）
const fetchUsers = () => {
  return async dispatch => {
    dispatch({ type: 'FETCH_USERS_REQUEST' });
    try {
      const response = await fetch('https://api.example.com/users');
      const users = await response.json();
      dispatch({ type: 'FETCH_USERS_SUCCESS', payload: users });
    } catch (error) {
      dispatch({ type: 'FETCH_USERS_FAILURE', payload: error.message });
    }
  };
};