PrimeNG p-multiselect无法选择30000个值

Question

我已经在数组中加载了值为30000的p-multiselect。当我点击从下拉列表中选择全部时，浏览器挂起/冻结。 测试用例：Please check test case at plnkr

<p-multiSelect [options]="cities1" [(ngModel)]="selectedCities1"></p-multiSelect>

   cities1:any =[];
   selectedCities1:any = [];

   ngOnInit() {
    for (let i=0; i<30000; i++) 
      this.cities1.push({label:'City'+i, value:'City'+i});
   }

请建议。

谢谢！