在导入 antd 后，输出的js文件 超过最大值 244 KiB

antd 的导入 使用 babel-plugin-loader

build 控制台会有警告，浏览器中打开时，控制台也有类似警告

WARNING in asset size limit: The following asset(s) exceed the recommended size limit (244 KiB).
This can impact web performance.
Assets:
  vendors~main.bundle.js (250 KiB)

WARNING in entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (244 KiB). This can impact web performance.
Entrypoints:
  main (254 KiB)
      vendors~main.bundle.js
      main.bundle.js

WARNING in webpack performance recommendations:
You can limit the size of your bundles by using import() or require.ensure to lazy load some parts of your application.
For more info visit https://webpack.js.org/guides/code-splitting/

已经按https://webpack.js.org/guides/code-splitting/所述第二步做过 code splitting