* ng性能太慢

Question

我有两个数组，一个用于数据＆＃39; data_list＆＃39;第二个是从第一个检索数据的密钥，我的问题是data_list包含每行1900行和20个字段，性能太慢，页面加载大约20秒。

如何改善此表的性能？

<tbody>
           <tr *ngFor="let data of data_list;let last = last;let i = index;"  #FireJQuery>

                    <td class="width-percent-1 sorting_1" tabindex="0"></td>
                    <td *ngFor="let col of Descriptive_FieldsMap;let i = index;">

                     <div >
                         {{data[col.DBName] || 'N/A'}}
                     </div>
                 </td> 
              </tr>
        </tbody>

ts代码

this._bondServices.getBonds(this._localStorageService.get('userID').toString(), this.rulebookID, this._localStorageService.get('Project').toString())

                       .subscribe(
                           data_list => 
                           {
                               this.data_list = data_list;


                            }, //Bind to view
                            err => {
                                // Log errors if any
                                console.log(err);
                            },
                            () => {if(this.data_list) window.dispatchEvent(new CustomEvent('bonds-ready'));});

}

Services.ts代码

 return this._http.get(link)
                        .map((res:Response) => res.json()) // ...and calling .json() on the response to return data
                        .catch((error:any) => Observable.throw(error.json().error || 'Server error'));