Issue title: 引入ant design之后，页面加载变慢
 Issue body: 我是在一个已经react+koa+webpack搭建好的项目之后引入ant design ，我通过npm install antd --save安装依赖之后，通过import { Tabs, Card, Select, Input } from 'antd';导入，但是发现导入之后页面加载的特别慢，求问大神是什么原因。
 Comments: 
 Comment 0: Hello @lixiang-king, your issue has been closed because it does not conform to our issue requirements. Please use the [Issue Helper](http://new-issue.ant.design?repo=ant-design) to create an issue, thank you!
 Comment 1: 
It will be better to write your issue/comment in English, so more people can understand you.
 And this means that more people can help you or benefit from your issue/comment.
 See: https://github.com/ant-design/ant-design/issues/4897
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