private async Task <double> GetLeaver(DsRequest request)
{
double leaver;
string memKey = "leaver" + request.StartTime.ToString("yyyyMMdd") + request.EndTime.ToString("yyyyMMdd");
if (!memoryCache.TryGetValue(memKey, out leaver))
{
leaver = await StatsService.GetLeaver(context, request);
memoryCache.Set(memKey, leaver, CacheService.BuildCacheOptions);
}
return(leaver);
}