Transfer穿梭框

[koryoII]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-start111111111111111111111

Steps to reproduce

ng.ant.design/components/transfer/zh使用 Table 组件作为自定义渲染列表。穿梭框倒数第二个案例，自定义表格，打开showsearch开关会持续吃内存，直到内存耗尽引起网页奔溃，原因是因为控件会不断的调用component.ts的convertItems方法。

What is expected?

期望结果是有变更才调用convertItems方法

What is actually happening?

实际结果是控件不断调用convertItems导致硬件内存耗尽。

Environment	Info
ng-zorro-antd	8.5.2
Browser	chrome 版本 79.0.3945.130（正式版本） （64 位）

---

在业务中使用是碰到，如果可以请尽快完善，如果已完善请邮件：[email protected],重现链接官方文档就可以看传来，shift esc调出chrome任务管理器，肉眼可以看到它不断在涨。

[zorro-bot]

Translation of this issue:

Transfer shuttle box

Reproduction link

Https://stackblitz.com/edit/ng-zorro-antd-start111111111111111111111

Steps to reproduce

ng.ant.design/components/transfer/zh using the Table component as a custom renderer list. Shuttle box penultimate cases, custom forms, open showsearch switch will continue to eat memory until the memory is exhausted Ben collapse caused the page, the reason is because the control will continue to call component.ts of convertItems method.

What is expected?

The results are expected to change only the method call convertItems

What is actually happening?

The net effect is control constantly calling convertItems cause hardware memory exhaustion.

Environment	Info
Ng-zorro-antd	8.5.2
Browser	chrome version 79.0.3945.130 (official version) (64)

---

In the business use is met, if you can please complete as soon as possible, if you have perfect please e-mail: [email protected], reproduce links to the official document can be seen coming, shift esc bring up the chrome task manager, the naked eye can see it is constantly rising.

[koryoII]

可以处理吗？

[xuewlw]

请问 这个问题解决了吗

[vthinkxie]

cc @Ricbet

[hsuanxyz]

close via #4670