在forEach循环中更新angular $ scope变量

I have a quite extensive filter/faceted search application. Data are loaded via an API, and then displayed on the page using a ng-repeat. There's also a google map instance which has a marker associated with every item. So the application is quite demanding in terms of computation. I guess I might be overloading some clients with weaker machines in the end. I have a quite extensive filter/faceted search