在web api控制器(.net core)中使用异步/等待或任务

I have a .net core API which has a controller that builds an aggregated object to return. the object it creates is made of data that comes from 3 method calls to a service class. These are all independent of each other and can be run in isolation from each other. Currently I am using tasks to improve the performance of this controller. the current version looks something like this...I have a .net core API which has a controller t