What is the most efficient way in SRM to receive all available resources from a specific resource pool during a specific timeslot?

This is the code I currently use but not sure if this is the best/optimal way:

private List<Resource> GetAvailableResourcesFromPool(Engine engine, String ResourpoolName)
{
//SRM call to get available resources from a resourcepool in a certain timerange
var resourceManagerHelper = new ResourceManagerHelper();
resourceManagerHelper.RequestResponseEvent += (sender, e) => e.responseMessage = engine.SendSLNetSingleResponseMessage(e.requestMessage);
var resourcePool = resourceManagerHelper.GetResourcePools(new ResourcePool { Name = ResourpoolName }).FirstOrDefault();
var context = new EligibleResourceContext
{
ResourceFilter = ResourceExposers.PoolGUIDs.Contains(resourcePool.ID),
TimeRange = new Skyline.DataMiner.Net.Time.TimeRangeUtc(startTime, endTime),
};
return resourceManagerHelper.GetEligibleResources(context).EligibleResources;
}