IE11打开demo站点，cpu占用率高，页面卡顿

[linkaiyi]

I'm submitting a...

[x] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Support request => Please do not submit support request here

Current behavior

IE11打开demo站点( https://ng.ant.design/#/components/form )，cpu占用率高，页面卡顿，试了2台机子都是这样，chrome没问题。

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Environment

Angular version: X.Y.Z

ng-zorro-antd version: X.Y.Z

Browser:
- [ ] Chrome (desktop) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [x] IE version 11
 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[jianqiao0313]

+1

[myepoch]

+1

[vthinkxie]

anyone can help us figure the problem, we can not reproduce it.

[linkaiyi]

特别是在拖动滚动条的时候很卡


以下是IE11的性能会话分析文件，可在IE11中导入查看。

ng_ant_design.zip

[vthinkxie]

@linkaiyi thanks a lot

[linkaiyi]

另外React版本虽然在滚动页面的时候cpu占用率也是在30%左右(cpu i5-7200U@2.5G)，但是很平滑，没有卡顿现象。

[lock]

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